本发明提供一种用于制备防蓝光聚氨酯光学树脂镜片的方法，所述制备方法为防蓝光助剂、异氰酸酯、多元硫醇化合物、催化剂、紫外吸收剂和脱模剂等混合后通过聚合反应得到所述防蓝光聚氨酯光学树脂。所述的防蓝光助剂是一种由5‑乙烯尿嘧啶与对羟基苯乙烯经聚合反应得到的共聚物。添加此共聚物在不明显降低440‑500nm无害蓝光透过率的情况下，将400‑440nm有害蓝光透过率大幅降至3％以下，而且能够延缓镜片黄度指数增长，改善异氰酸酯和多元硫醇的反应活性，有效提高产品合格率。

The invention provides a method for preparing an anti-blue-light polyurethane optical resin lens. The preparation method comprises the following steps: mixing an anti-blue-light auxiliary agent, isocyanate, a polymercaptan compound, a catalyst, an ultraviolet absorbent, a demolding agent and the like, and carrying out a polymerization reaction to obtain the anti-blue-light polyurethane optical resin, wherein the anti-blue-light auxiliary agent is a copolymer obtained by carrying out a polymerization reaction on 5-vinyluracil and p-hydroxystyrene. By adding the copolymer, the transmittance of harmful blue light of 400-440 nm is greatly reduced to 3% or below under the condition that the transmittance of harmless blue light of 440-500 nm is not obviously reduced, the yellowness index increase of the lens can be delayed, the reaction activity of isocyanate and polymercaptan is improved, and the product qualification rate is effectively increased.