Author: claimsbot

1. A fluid power fluid cylinder and more particularly a pneumatic power cylinder, comprising
a cylinder housing (2) containing therein a piston receiving space (6) in which a piston (8) able to be moved by fluid actuation is arranged, which is kinematically coupled with a piston rod (14) extending out at the front end of the cylinder housing (14),
a control system housing (33) mounted on the rear end of the cylinder housing, which system housing contains control components (34) cooperating for control of fluid actuation of the piston (8), such control components including an electrically actuated valve means (44) and furthermore electronic valve circuitry andor electronic control circuitry (58) cooperating in the electrical control of the valve means (44),
electrical connection means (63) provided externally on the control system housing (33) for the supply of electrical control signals, which electrical connection means (63) are connected in the control housing (33) with electronic valve circuitry andor electronic control circuitry (58),
and fluid connection means (48) provided externally on the control system housing (33) for the supply of an actuating fluid, which electrical connection means (48) are connected with the valve means (44), whence control ducts (17 and 18) emerge, which extend in the wall of the cylinder housing (4) to the piston receiving space (6).
2. The fluid power cylinder as set forth in claim 1, characterized in that the outline of the control system housing (33) does not project past the outline of the axially adjoining cylinder housing (2).
3. The fluid power cylinder as set forth in claim 1 or in claim 2, characterized in that the cylinder housing (2) and the control system housing (33) possess essentially similar rectangular and preferably square outlines.
4. The fluid power cylinder as set forth in any of the claims 1 through 3, characterized in that on the cylinder housing (2) sensor means (26 and 27) are provided in the peripheral part of the piston receiving space (6) for detecting the position of the piston (8), and electrical sensor signal lines (77) extend from such sensor means and into the control system housing (33).
5. The fluid power cylinder as set forth in claim 4, characterized in that the sensor means (26 and 27) and the sensor signal lines (77) are accommodated in sensor grooves (32) provided on the outer periphery of the cylinder housing (2) and preferably in such a manner that same do not extend past the outline of the cylinder housing (2).
6. The fluid power cylinder as set forth in claim 4 on claim 5, characterized in that the electrical sensor signal lines (77) extend in the transition zone between the cylinder housing (2) and the control system housing (33) through an opening (76) turned toward the cylinder housing (2), of the control system housing into the interior space (37) in the control system housing (33).
7. The fluid power cylinder as set forth in any one of the claims 4 through 6, characterized in that the sensor signal lines (77) are connected in the interior of the control system housing (33) with the electronic valve circuitry andor electronic control circuitry (58) or directly with the electrical connection means (63).
8. The fluid power cylinder as set forth in any one of the claims 1 through 7, characterized in that the control system housing (33) has at least one, preferably laterally placed access opening (65, 72 and 74), which is sealed off by a removable housing cover (66, 73 and 75).
9. The fluid power cylinder as set forth in claim 8, characterized in that a housing cover (66) constitutes a support for the electronic valve circuitry andor electronic control circuitry (58) arranged on the inner side of the support.
10. The fluid power cylinder as set forth in claim 9, characterized in that the electronic valve circuitry andor electronic control circuitry (58) is provided on a printed circuit board (68) with electronic circuitry mounted on the inner side of the respective housing cover (68).
11. The fluid power cylinder as set forth in any one of the claims 1 through 10, characterized in that on the side the control system housing (63) has a plurality of access openings (65, 72 and 74) arranged about the periphery and closed by detachable housing covers (66, 73 and 75), one opening (72) being opposite to the electrical drive means (57) of the valve means (44) and a further access opening (65) being arranged adjacent to the electronic valve circuitry andor electronic control circuitry (58).
12. The fluid power cylinder as set forth in any one of the claims 1 through 11, characterized in that the electronic control circuitry (58) comprises a field bus electronic system.
13. The fluid power cylinder as set forth in any one of the claims 1 through 12, characterized in that the electrical connection means (63) on the control system housing (33) are in the form of a field bus connection.
14. The fluid power cylinder as set forth in any one of the claim 1 through 14, characterized in that the control system housing (33) is pot-like and has a floor (68) and a side wall (42) and with the open side, opposite to the floor (38) to the fore, is mounted on the rear side of the cylinder housing (2).
15. The fluid power cylinder as set forth in any one of the claims 1 through 14, characterized in that the valve means (44) extend between the rear end face (24) of the cylinder housing (2) and an inner face (46) of the housing, opposite to such end face (24), of the control system housing (33) and is held on such faces.
16. The fluid power cylinder as set forth in claim 15, characterized in that the valve means (44) possesses plug dowels (47), which are fitted in holding openings (49) in the rear end face (24 of the cylinder housing (2) and in the housing’s inner face (46) facing same, in the control system housing (33) in an interlocking manner.
17. The fluid power cylinder as set forth in claim 15 or claim 16, characterized in that the housing’s inner face (46) is constituted by the inner face of the floor (38) of the pot-like control system housing (33).
18. The fluid power cylinder as set forth in any one of the claims 1 through 17, characterized in that the fluid connection means (48) are provided on the rear side, facing away from the cylinder housing (2) of the control system housing (33).
19. The fluid power cylinder as set forth in any one of the claims 1 through 18, characterized by a design in the form of a pneumatic fluid power cylinder, in the case of which all venting openings (53) are provided at the rear side, facing away from the cylinder housing (2) of the control system housing (33).
20. The fluid power cylinder as set forth in claim 19, characterized in that each venting opening (53) is fitted with a muffler (55) and preferably a muffler with an integral venting choke means.
21. The fluid power cylinder as set forth in any one of the claims 1 through 20, characterized in that the valve means (44) comprises a four way valve or a five way valve or two three way valves.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

1. A method of device tracking, comprising:
detecting, by a server, a request from a client device to visit a third-party content supplier in association with a redirection instruction;
identifying, by the server and in response to the request, device information associated with the client device, location information associated with the client device, and a time of the request;
generating, by the server, a first time-dependent identifier for the client device using the device information, the location information, and the time of the request;
monitoring, by the server, accesses to content provided by the third-party content supplier; and
associating, by the server, an access to a piece of content provided by the third-party content supplier with the request based on the first time-dependent identifier corresponding to a second time-dependent identifier associated with the access to the piece of content.
2. The method as recited in claim 1, further comprising:
identifying, by the server and in response to the access, device information associated with a device that accessed the piece of content, location information associated with the device that accessed the piece of content, and a of the access to the piece of content; and
generating, by the server, the second time-dependent identifier using the device information associated with the device that accessed the piece of content, location information associated with the device that accessed the piece of content, and a time of the access to the piece of content.
3. The method as recited in claim 2, further comprising:
comparing the first time-dependent identifier to the second time dependent identifier; and
determining that the first-time dependent identifier matches the second time dependent identifier.
4. The method as recited in claim 3, wherein:
the request is in connection with a request to download an application;
the third-party content supplier comprises a third-party application store; and
the redirection instruction comprises an application switch instruction to the third-party application store to allow for downloading of the application.
5. The method as recited in claim 4, wherein monitoring, by the server, accesses to content provided by the third-party content supplier comprises receiving, from client devices, indications of launches of the application.
6. The method as recited in claim 1, wherein generating, by the server, the first time-dependent identifier for the client device using the time of the request comprises:
truncating the time of the request; and
generating a time window for the first time dependent identifier based on the truncated time of the request.
7. The method as recited in claim 6, wherein truncating the time of the request further comprises:
removing at least one digit from an epoch time of the request;
dividing a remaining final digit of the epoch time by a predetermined number; and
rounding the final digit of the epoch time down to a closest integer.
8. The method as recited in claim 7, further comprising assigning the first time-dependent identifier to one of a plurality of identifier groups based on the final digit of the epoch time and the predetermined number.
9. The method as recited in claim 1, wherein determining the device information associated with the client device comprises determining at least one of an operating system version for the client device or a device type for the client device.
10. The method as recited in claim 1, wherein determining the location information associated with the client device comprises determining a truncated Internet Protocol address for the client device.
11. The method as recited in claim 1, wherein the first time-dependent identifier further comprises an application identifier for an application associated with the redirection instruction.
12. The method as recited in claim 1, wherein generating the first time-dependent identifier comprises:
generating a concatenated number by combining a number representing the device information associated with the client device, a number representing the location information associated with the client device, and a number representing the time of the request; and
performing a hash on the concatenated number.
13. A method of device identification, comprising:
detecting, by a server, an initial event performed by a first client device;
identifying, by the server and in response to the initial event, device information associated with the first client device, location information associated with the first client device at a time of the initial event, and a time of the initial event;
identifying a time period associated with the time of the initial event;
detecting, by the server, a plurality of subsequent events associated with one or more client devices; and
associating, by the server, a particular subsequent event, of the plurality of subsequent events, with the initial event based on device information associated with the particular subsequent event corresponding to the device information associated with the first client device, location information associated with the particular subsequent event corresponding to the location information associated with the first client device, and a time of the particular subsequent event being within the identified time period.
14. The method as recited in claim 13, further comprising generating a first time-dependent identifier based on the device information associated with the first client device, location information associated with the first client device at the time of the initial event, and the time of the initial event.
15. The method as recited in claim 14, wherein generating the first time-dependent identifier further comprises:
truncating the time of the initial event; and
generating the time period based on the truncated time of the initial event.
16. The method as recited in claim 13, wherein the initial event corresponds to a request from the first client device to visit a third-party content supplier for downloading an application, and the particular subsequent event corresponds to a launch of the application.
17. The method as recited in claim 13, further comprising:
determining that the first time-dependent identifier corresponds to a second time-dependent identifier associated with the particular event; and
associating the first client device with a campaign corresponding to the initial event.
18. A system for device tracking, comprising:
at least one processor;
at least one non-transitory computer readable storage medium storing instructions thereon, that, when executed by the at least one processor, cause the system to:
detect, at a server, a request from a client device to visit a third-party content supplier in association with a redirection instruction;
identify, by the server and in response to the request, device information associated with the client device, location information associated with the client device, and a time of the request;
generate, by the server, a first time-dependent identifier for the client device using the device information, the location information, and the time of the request;
monitor, by the server, accesses to content provided by the third-party content supplier; and
associate, by the server, an access to a piece of content provided by the third-party content supplier with the request based on the first time-dependent identifier corresponding to a second time-dependent identifier associated with the access to the piece of content.
19. The system as recited in claim 18, further comprising:
truncating the time of the request; and
generating a valid time window for the first time dependent identifier based on the truncated request time.
20. The system as recited in claim 19, wherein truncating the request time further comprises:
removing at least one digit from an epoch time associated with the request;
dividing a remaining final digit of the epoch time by a predetermined number; and rounding the final digit of the epoch time down to a closest integer.

1-6. (canceled)
7. A process for processing natural gas to generate longer-chain hydrocarbons, the process comprising subjecting the gas to steam reforming to generate a mixture of carbon monoxide and hydrogen, and then subjecting this mixture to Fischer-Tropsch synthesis, cooling and separating the resulting mixture into a liquid phase comprising the longer-chain hydrocarbons and a gas phase, and separating the gas phase into a hydrogen-rich stream and a hydrocarbon-rich stream using a hydrogen-permeable membrane, wherein the hydrocarbon-rich stream is returned to be combined with the natural gas and the steam and subjected to catalytic methanation in a prereformer prior to being subjected to steam reforming.
8. A process as claimed in claim 7 wherein the hydrogen-rich stream is supplied to a combustion channel to provide heat for the steam-reforming reaction.
9. A process as claimed in claim 7 wherein the prereformer is at a temperature of about 400\xb0 C.
10. A process as claimed in claim 7 wherein the steam reforming is carried out using a platinumrhodium catalyst.
11. A plant for processing natural gas to generate longer-chain hydrocarbons, the plant comprising a reforming reactor for subjecting the gas to steam reforming to generate a mixture of carbon monoxide and hydrogen, a reactor for subjecting this mixture to Fischer-Tropsch synthesis, means to cool and separate the resulting mixture into a liquid phase comprising the longer-chain hydrocarbons and a gas phase, a hydrogen-permeable membrane for separating the gas phase into a hydrogen-rich stream and a hydrocarbon-rich stream, and means to return the hydrocarbon-rich stream to be combined with the natural gas and the steam and supplied to a pre-reformer in which it is subjected to catalytic methanation prior to being fed into the reforming reactor.
12. A plant as claimed in claim 11 also including means to supply the hydrogen-rich stream to a combustion channel to provide heat for the reforming reactor.
13. A plant as claimed in claim 11 in which each reactor comprises a plurality of flat metal sheets in a stack, with grooves which define first and second gas flow channels, the channels being arranged alternately to ensure good thermal contact between the gases in them.
14. A plant as claimed in claim 13 wherein each flow channel in which a reaction occurs contains a catalyst structure on a metal substrate, this catalyst structure being removable.

The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.

What is claimed is:

1. A stable ophthalmic composition which is comfortable to the human eye comprising:
about 0.005% to about 0.5% wv hyaluronic acid;
about 0.0025% to about 0.03% wv stabilized oxy-chloro complex; and
boric acidborate buffer to maintain a pH of about 6.0 to about 9.0;
wherein the composition comprises no more than about 0.0075% hydrogen peroxide.
2. The stable ophthalmic composition of claim 1, wherein said hyaluronic acid has a molecular weight of about 200,000 to 4,000,000 daltons
3. The stable ophthalmic composition of claim 2, wherein said hyaluronic acid has a molecular weight of about 750,000 to 2,000,000 daltons.
4. The stable ophthalmic composition of claim 3, wherein said hyaluronic acid has a molecular weight of about 800,000 to about 1,750,000 daltons.
5. The stable ophthalmic composition of claim 4, wherein said hyaluronic acid has a molecular weight of about 900,000 to about 1,500,000 daltons.
6. The stable ophthalmic composition of claim 5, wherein said hyaluronic acid has a molecular weight of about 1,000,000 daltons.
7. The stable ophthalmic composition of claim 1, wherein the concentration of said hyaluronic acid is about 0.1% to about 0.5% wv.
8. The stable ophthalmic composition of claim 1, wherein the concentration of said hyaluronic acid is about 0.01% to about 0.3% wv.
9. The stable ophthalmic composition of claim 1, wherein the concentration of said stabilized oxy-chloro complex is about 0.003% to about 0.02% wv.
10. The stable ophthalmic composition of claim 9, wherein the concentration of said stabilized oxy-chloro complex is about 0.004% to about 0.009% wv.
11. The stable ophthalmic composition of claim 10, wherein the concentration of said stabilized oxy-chloro complex is about 0.005% wv.
12. The stable ophthalmic composition of claim 1, wherein the pH of said composition is about 6.8 to about 8.0.
13. The stable ophthalmic composition of claim 12, wherein the pH of said composition is about 7.0 to about 7.4.
14. The stable ophthalmic composition of claim 13, wherein the pH of said composition is about 7.2.
15. The stable ophthalmic composition of claim 1, further comprising balanced salts.
16. The stable ophthalmic composition of claim 15, wherein said balanced salts comprise NaCl, KCl, CaCl2, and MgCl2.
17. The stable ophthalmic composition of claim 16, wherein the concentration of NaCl is about 0.1 to about 1% wv.
18. The stable ophthalmic composition of claim 16, wherein the concentration of KCl is about 0.02 to about 0.5% wv.
19. The stable ophthalmic composition of claim 16, wherein the concentration of CaCl2 is about 0.0005 to about 0.1% wv.
20. The stable ophthalmic composition of claim 16, wherein the concentration of MgCl2 is about 0.0005 to about 0.1% wv.
21. The stable ophthalmic composition of claim 15, wherein the balanced salts provide a composition osmolality of about 140 to about 400 mOsmkg.
22. The stable ophthalmic composition of claim 21, wherein the balanced salts provide a composition osmolality of about 240 to about 330 mOsmkg.
23. The stable ophthalmic composition of claim 22, wherein the balanced salts provide a composition osmolality of about 260 to about 300 mOsmkg.
24. The stable ophthalmic composition of claim 23, wherein the balanced salts provide a composition osmolality of about 270 mOsmkg.
25. The stable ophthalmic composition of claim 1, further comprising about 0.05 to about 1% polyol demulcent.
26. The stable ophthalmic composition of claim 25, further comprising about 0.2 to about 1% polyol demulcent.
27. The stable ophthalmic composition of claim 25, wherein the polyol demulcent is selected from the group consisting of glycerin, polyethylene glycol 300, polyethylene glycol 400, polysorbate 80 and propylene glycol.
28. The stable ophthalmic composition of claim 1 further comprising about 0.2 to about 2.5% cellulose derivative demulcent.
29. The stable ophthalmic composition of claim 28 wherein the cellulose derivative demulcent is selected from the group consisting of carboxymethylcellulose sodium, hydroxyethyl cellulose, hydroxypropyl methylcellulose, and methylcellulose.
30. The stable ophthalmic composition of claim 28 wherein the cellulose derivative demulcent has a molecular weight equal to or less than about 80,000.
31. The stable ophthalmic composition of claim 30 wherein the cellulose derivative demulcent has a molecular weight of about 10,000 to about 40,000.
32. The stable ophthalmic composition of claim 1 wherein the composition comprises less than about 0.005% hydrogen peroxide.
33. The stable ophthalmic composition of claim 32 wherein hydrogen peroxide is substantially absent.
34. A method of treating dry eye in a manner which is comfortable to the human eye comprising:
instilling a stable ophthalmic composition into a human eye;
wherein said stable ophthalmic composition comprises:
about 0.005% to about 0.5% wv hyaluronic acid;
about 0.0025% to about 0.03% wv stabilized oxy-chloro complex; and
boric acidborate buffer to maintain a pH of about 6.0 to about 9.0;
wherein the composition comprises no more than about 0.0075% hydrogen peroxide.
35. The method of claim 34, wherein a contact lens is present in said human eye.
36. The method of claim 34, wherein said hyaluronic acid has a molecular weight of about 200,000 to 4,000,000 daltons.
37. The method of claim 36, wherein said hyaluronic acid has a molecular weight of about 750,000 to 2,000,000 daltons.
38. The method of claim 37, wherein said hyaluronic acid has a molecular weight of about 800,000 to about 1,750,000 daltons.
39. The method of claim 38, wherein said hyaluronic acid has a molecular weight of about 900,000 to about 1,500,000 daltons.
40. The method of claim 39, wherein said hyaluronic acid has a molecular weight of about 1,000,000 daltons.
41. The method of claim 34, wherein the concentration of said hyaluronic acid is about 0.1% to about 0.5% wv.
42. The method of claim 34, wherein the concentration of said hyaluronic acid is about 0.01% to about 0.3% wv.
43. The method of claim 34, wherein the concentration of said stabilized oxy-chloro complex is about 0.003% to about 0.02% wv.
44. The method of claim 43, wherein the concentration of said stabilized oxy-chloro complex is about 0.004% to about 0.009% wv.
45. The method of claim 44, wherein the concentration of said stabilized oxy-chloro complex is about 0.005% wv.
46. The method of claim 34, wherein the pH of said composition is about 6.8 to about 8.0.
47. The method of claim 46, wherein the pH of said composition is about 7.0 to about 7.4.
48. The method of claim 47, wherein the pH of said composition is about 7.2.
49. The method of claim 34, wherein said stable ophthalmic composition further comprises balanced salts.
50. The method of claim 49, wherein said balanced salts comprise NaCl, KCl, CaCl2, and MgCl2.
51. The method of claim 50, wherein the concentration of NaCl is about 0.1 to about 1% wv.
52. The method of claim 50, wherein the concentration of KCl is about 0.02 to about 0.5% wv.
53. The method of claim 50, wherein the concentration of CaCl2 is about 0.0005 to about 0.1% wv.
54. The method of claim 50, wherein the concentration of MgCl2 is about 0.0005 to about 0.1% wv.
55. The method of claim 49, wherein the balanced salts provide a composition osmolality of about 140 to about 400 mOsmkg.
56. The method of claim 55, wherein the balanced salts provide a composition osmolality of about 240 to about 330 mOsmkg.
57. The method of claim 56, wherein the balanced salts provide a composition osmolality of about 260 to about 300 mOsmkg.
58. The method of claim 57, wherein the balanced salts provide a composition osmolality of about 270 mOsmkg.
59. The method of claim 34, wherein said stable ophthalmic composition further comprises about 0.05 to about 1% polyol demulcent.
60. The method of claim 59, wherein said stable ophthalmic composition further comprises about 0.2 to about 1% polyol demulcent.
61. The method of claim 59, wherein the polyol demulcent is selected from the group consisting of glycerin, polyethylene glycol 300, polyethylene glycol 400, polysorbate 80 and propylene glycol.
62. The method of claim 34 wherein said stable ophthalmic composition further comprises about 0.2 to about 2.5% cellulose derivative demulcent.
63. The method of claim 62 wherein the cellulose derivative demulcent is selected from the group consisting of carboxymethylcellulose sodium, hydroxyethyl cellulose, hydroxypropyl methylcellulose, and methylcellulose.
64. The method of claim 62 wherein the cellulose derivative demulcent has a molecular weight equal to or less than about 80,000.
65. The method of claim 64 wherein the cellulose derivative demulcent has a molecular weight of about 10,000 to about 40,000.
66. The method of claim 34 wherein said stable ophthalmic composition comprises less than about 0.005% hydrogen peroxide.
67. The method of claim 35 wherein hydrogen peroxide is substantially absent.
68. A method of increasing tear film break-up time in a mammal’s eye in a manner comfortable to the eye comprising:
instilling a stable ophthalmic composition into said eye;
wherein said stable ophthalmic composition comprises hyaluronic acid and stabilized oxy-chloro complex;
wherein the composition comprises no more than about 0.0075% hydrogen peroxide.
69. The method of claim 68, wherein said stable ophthalmic composition comprises:
about 0.005% to about 0.5% wv hyaluronic acid;
about 0.0025% to about 0.03% wv stabilized oxy-chloro complex; and
boric acidborate buffer to maintain a pH of about 6.0 to about 9.0.
70. The method of claim 68, wherein a contact lens is present in said human eye.
71. The method of claim 68, wherein said hyaluronic acid has a molecular weight of about 200,000 to 4,000,000 daltons.
72. The method of claim 71, wherein said hyaluronic acid has a molecular weight of about 750,000 to 2,000,000 daltons.
73. The method of claim 72, wherein said hyaluronic acid has a molecular weight of about 800,000 to about 1,750,000 daltons.
74. The method of claim 73, wherein said hyaluronic acid has a molecular weight of about 900,000 to about 1,500,000 daltons.
75. The method of claim 74, wherein said hyaluronic acid has a molecular weight of about 1,000,000 daltons.
76. The method of claim 69, wherein the concentration of said hyaluronic acid is about 0.1% to about 0.5% wv.
77. The method of claim 69, wherein the concentration of said hyaluronic acid is about 0.01% to about 0.3% wv.
78. The method of claim 69, wherein the concentration of said stabilized oxy-chloro complex is about 0.003% to about 0.02% wv.
79. The method of claim 78, wherein the concentration of said stabilized oxy-chloro complex is about 0.004% to about 0.009% wv.
80. The method of claim 79, wherein the concentration of said stabilized oxy-chloro complex is about 0.005% wv.
81. The method of claim 69, wherein the pH of said composition is about 6.8 to about 8.0.
82. The method of claim 81, wherein the pH of said composition is about 7.0 to about 7.4.
83. The method of claim 82, wherein the pH of said composition is about 7.2.
84. The method of claim 68, wherein said stable ophthalmic composition further comprises balanced salts.
85. The method of claim 84, wherein said balanced salts comprise NaCl, KCl, CaCl2, and MgCl2.
86. The method of claim 85, wherein the concentration of NaCl is about 0.1 to about 1% wv.
87. The method of claim 85, wherein the concentration of KCl is about 0.02 to about 0.5% wv.
88. The method of claim 85, wherein the concentration of CaCl2 is about 0.0005 to about 0.1% wv.
89. The method of claim 85, wherein the concentration of MgCl2 is about 0.0005 to about 0.1% wv.
90. The method of claim 84, wherein the balanced salts provide a composition osmolality of about 140 to about 400 mOsmkg.
91. The method of claim 90, wherein the balanced salts provide a composition osmolality of about 240 to about 330 mOsmkg.
92. The method of claim 91, wherein the balanced salts provide a composition osmolality of about 260 to about 300 mOsmkg.
93. The method of claim 92, wherein the balanced salts provide a composition osmolality of about 270 mOsmkg.
94. The method of claim 68, wherein said stable ophthalmic composition further comprises about 0.05 to about 1% polyol demulcent.
95. The method of claim 94, wherein said stable ophthalmic composition further comprises about 0.2 to about 1% polyol demulcent.
96. The method of claim 94, wherein the polyol demulcent is selected from the group consisting of glycerin, polyethylene glycol 300, polyethylene glycol 400, polysorbate 80 and propylene glycol.
97. The method of claim 68 wherein said stable ophthalmic composition further comprises about 0.2 to about 2.5% cellulose derivative demulcent.
98. The method of claim 97 wherein the cellulose derivative demulcent is selected from the group consisting of carboxymethylcellulose sodium, hydroxyethyl cellulose, hydroxypropyl methylcellulose, and methylcellulose.
99. The method of claim 97 wherein the cellulose derivative demulcent has a molecular weight equal to or less than about 80,000.
100. The method of claim 99 wherein the cellulose derivative demulcent has a molecular weight of about 10,000 to about 40,000.
101. The method of claim 68 wherein said stable ophthalmic composition comprises less than about 0.005% hydrogen peroxide.
102. The method of claim 101 wherein hydrogen peroxide is substantially absent.