Patent ID: 8877103

Claim:
A process for manufacturing a contact lens comprising at least one thermochromic compound consisting essentially of the steps of: selecting a photoinitiator which absorbs at a first wavelength; selecting a thermochromic compound which displays absorption at the first wavelength when the compound is at a first temperature and but exhibits at least an 80% reduction in absorbance at the first wavelength at a second temperature between about 55° C. to about 90° C.; dispensing a reaction mixture into a mold, the mixture comprising at least one polymerizable monomer, the photoinitiator and the thermochromic compound; equilibrating the reaction mixture to said second temperature, causing the thermochromic compound to reduce its molar absorbivity at the first wavelength; curing the reaction mixture at said second temperature to form a thermochromic contact lens by exposing the mixture to radiation that includes the first wavelength.