Method of manufacturing colored lens

Abstract

A method of manufacturing a colored lens includes: applying a coating liquid for forming a dyeable hard coat layer over a lens substrate; firstly heating the lens substrate coated with the coating liquid after the coating step at a temperature of T1° C. for t1 hours; dyeing the heated lens substrate by dipping it in a dyeing liquid after the first heating step; and secondly heating the lens substrate which is dyed after the dyeing step at a temperature of T2° C. for t2 hours, wherein the following expression is satisfied when the product of the temperature T1 and the time t1 is a first management value Q1 and the product of the temperature T2 and the time t2 is a second management value Q2: 0.2<Q1/(Q1+Q2)≦0.5.

Dependencies are inferred from the claim text.