Method for modifying a surface
First Claim
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1. A method of forming a contact lens, comprising the steps of:
- forming a lens mold having a first mold portion defining a first optical surface and a second mold portion defining a second optical surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a lens forming cavity is formed between said first optical surface and said second optical surface;
applying a polyanionic material and a polycationic material to at least one of said optical surfaces to form a polyionic bilayer on said optical surface;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said optical surfaces define said lens forming cavity;
dispensing a polymerizable substrate material into said lens forming cavity; and
curing said polymerizable substrate material within said lens forming cavity such that a contact lens is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one optical surface of said mold portion and reattaches to said formed contact lens such that said contact lens becomes coated with said portion of said polyionic bilayer.
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Abstract
A method of forming a contact lens within a mold is provided. A coating of a polyionic material(s) is applied to the mold before forming a lens therein. The coating can be applied by spraying or dipping the mold within a solution(s) of polyionic materials. Various other additives can also be applied to the mold. The coating can then be transferred to a contact lens formed within the mold such that the resulting lens has altered surface properties.
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Citations
51 Claims
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1. A method of forming a contact lens, comprising the steps of:
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forming a lens mold having a first mold portion defining a first optical surface and a second mold portion defining a second optical surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a lens forming cavity is formed between said first optical surface and said second optical surface;
applying a polyanionic material and a polycationic material to at least one of said optical surfaces to form a polyionic bilayer on said optical surface;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said optical surfaces define said lens forming cavity;
dispensing a polymerizable substrate material into said lens forming cavity; and
curing said polymerizable substrate material within said lens forming cavity such that a contact lens is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one optical surface of said mold portion and reattaches to said formed contact lens such that said contact lens becomes coated with said portion of said polyionic bilayer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
providing a solvent solution comprising a solvent and at least one polyionic material;
allowing said contact lens to swell in said solvent solution;
removing said contact lens from said solvent solution after said polymeric material sufficiently swells therein; and
allowing said contact lens to shrink such that said at least one polyionic material becomes entrapped within said contact lens.
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36. A method of forming a contact lens, comprising the steps of:
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forming a lens mold having a first mold portion defining a first optical surface and a second mold portion defining a second optical surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a lens forming cavity is capable of forming between said first optical surface and said second optical surface;
spraying a first polyionic material having a predetermined charge onto at least one of said optical surfaces, spraying a second polyionic material having an opposite charge of said first polyionic material onto said at least one of said surfaces such that a polyionic bilayer is formed thereon;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said optical surfaces define said lens forming cavity;
dispensing a polymerizable substrate material into said lens forming cavity; and
curing said polymerizable substrate material within said lens forming cavity such that a contact lens is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one optical surface of said mold portion and reattaches to said formed contact lens such that said contact lens becomes coated with said portion of said polyionic bilayer. - View Dependent Claims (37, 38, 39, 40)
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41. A method of forming a contact lens, comprising the steps of:
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forming a lens mold having a first mold portion defining a first optical surface and a second mold portion defining a second optical surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a lens forming cavity is capable of forming between said first optical surface and said second optical surface;
dipping at least one of said mold portions into a first polyionic material having a predetermined charge;
dipping said at least one mold portion into a second polyionic material having an opposite charge of said first polyionic material such that a polyionic bilayer is formed on said at least one mold portion;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said optical surfaces define said lens forming cavity;
dispensing a polymerizable substrate material into said lens forming cavity; and
curing said polymerizable substrate material within said lens forming cavity such that a contact lens material is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one optical surface of said mold portion and reattaches to said formed contact lens such that said contact lens becomes coated with said portion of said polyionic bilayer. - View Dependent Claims (42, 43, 44, 45)
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46. A method of forming a contact lens, comprising the steps of:
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forming a lens mold having a first mold portion defining a first optical surface and a second mold portion defining a second optical surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a lens forming cavity is capable of forming between said first optical surface and said second optical surface;
dipping at least one of said mold portions into a solution containing a polyanionic material and a polycationic material such that a polyionic bilayer is formed on said at least one mold portion;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said optical surfaces define said lens forming cavity;
dispensing a polymerizable substrate material into said lens forming cavity; and
curing said polymerizable substrate material within said lens forming cavity such that a contact lens is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one optical surface of said mold portion and reattaches to said formed contact lens such that said contact lens becomes coated with said portion of said polyionic bilayer. - View Dependent Claims (47, 48, 49, 50)
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51. A method of forming a polymeric article, comprising the steps of:
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forming a mold having a first mold portion defining a first surface and a second mold portion defining a second surface, wherein said first mold portion and said second mold portion are configured to receive each other such that a cavity is formed between said first surface and said second surface;
applying a polyanionic material and a polycationic material to at least one of said surfaces to form a polyionic bilayer on said surface;
positioning said first mold portion and said second mold portion such that said mold portions receive each other and said surfaces define said cavity;
dispensing a polymerizable substrate material into said cavity; and
curing said polymerizable substrate material within said cavity such that a polymeric article is formed, whereby at least a portion of said polyionic bilayer detaches from said at least one surface of said mold portion and reattaches to said formed polymeric article such that said polymeric article becomes coated with said portion of said polyionic bilayer.
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Specification