Method of producing a plastic lens having a coating layer

A method of producing a plastic lens having a cured coating layer, comprising the steps of:

• forming an uncured coating layer from a photocurable coating composition comprising at least a) a photochromic compound, b) a radically polymerizable monomer and c) a photopolymerization initiator on one surface of a plastic lens;
• and
• irradiating the plastic lens having the uncured coating layer with light from an LED having an emission peak wavelength of 350 nm or more to less than 450 nm from above the outer surface of the uncured coating layer to cure the uncured coating layer,
• wherein the irradiation intensity of light on the outer surface of the uncured coating layer of the plastic lens having the uncured coating layer is 300 mW/cm2 to 1000 mW/cm2 at an emission peak wavelength,
• wherein the plastic lens has a center part thickness of less than 2 mm and a peripheral part thicker than the center part,
• wherein the photochromic compound (a) comprises indenonaphthopyran compound having a molar absorptivity at 400 nm of 3,000 L/(mol·cm) or more and an average molar absorptivity at 350 to 450 nm of 3,000 L/(mol·cm) or more.