On-demand photoinitiated polymerization
AssigneeCalifornia Institute of Technology
InventorsAndrew J. Boydston, Robert H. Grubbs, Chris Daeffler, Nebojsa Momcilovic
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Abstract
Compositions and methods for adjustable lenses are provided. In some embodiments, the lenses contain a lens matrix material, a masking compound, and a prepolymer. The lens matrix material provides structure to the lens. The masking compound is capable of blocking polymerization or crosslinking of the prepolymer, until photoisomerization of the compound is triggered, and the compound is converted from a first isomer to a second isomer having a different absorption profile. The prepolymer is a composition that can undergo a polymerization or crosslinking reaction upon photoinitiation to alter one or more of the properties of the lenses.
Claims35
A composition comprising:
- (a) a masking compound capable of photoisomerization between a first isomer and a second isomer upon absorption of electromagnetic energy at a first wavelength and intensity;
- and
- (b) a prepolymer capable of polymerization or crosslinking upon photoinitiation with electromagnetic energy at a second wavelength and intensity;
- wherein the masking compound is present in an amount sufficient to block polymerization or crosslinking of the prepolymer at the second wavelength unless or until the masking compound is photoisomerized from the first isomer to the second isomer;
- and
- wherein the composition is an intraocular implant further comprising a matrix material.
Dependencies are inferred from the claim text.