Patent ID: 7771783

Claim:
A method, of manufacturing a colored lens, comprising: applying a coating liquid for forming a dyeable hard coat layer over a lens substrate to provide a coated substrate; firstly heating the coated substrate at a temperature of T 1 ° C. for t 1 hours to provide a heated lens substrate; dyeing the heated lens substrate by dipping it in a dyeing liquid after the first heating step to provide a dyed lens; and heating the dyed lens at a temperature of T 2 ° C. for t 2 hours; wherein the following expression is satisfied when the product of the temperature T 1 and the time t 1 is a first management value Q 1 and the product of the temperature T 2 and the time t 2 is a second management value Q 2 : 0.2< Q 1/( Q 1+ Q 2)≦0.5; wherein the sum of the time t 1 and the time t 2 satisfies the following requirement: 1 hour≦( t 1 +t 2 )≦3 hours.