Method for manufacturing photochromic lens and photochromic lens

A method for manufacturing a photochromic lens using an injection molding apparatus,

• the injection molding apparatus including:
• an approximately circular-shaped substrate;
• an approximately circular-shaped resin substrate disposed to face a surface of the substrate;
• a fixing member fixing a circumferential edge part of the substrate and a circumferential edge part of the resin substrate;
• a gap formed between the substrate and the resin substrate and having a width in a thickness direction of 0.1 to 2.5 mm at an approximate circle center part;
• an injection part provided in the fixing member for injecting a polymerizable composition into the gap;
• and
• a space formed in at least a portion of a periphery of the gap and allowing the injection part to communicate with the gap,
• wherein the space is formed in at least a portion of a periphery of the resin substrate, and a width in a thickness direction of the space is larger than the width in the thickness direction of the gap,
• the method comprising:
• a step of injecting the polymerizable composition through the injection part and filling the gap with the polymerizable composition through the space;
• a step of heating the filled polymerizable composition to be polymerized and cured and forming a photochromic layer over the resin substrate;
• and
• a step of taking out a resulting laminate composed of the resin substrate and the photochromic layer,
• wherein the polymerizable composition contains an isocyanate compound, a thiol compound, a polyol compound, and a photochromic compound.