To provide a technique for giving a photocurable composition in a good productivity which has an optically excellent transparency and contains superfine particles in such a state that the secondary agglomeration is unusually reduced. 光学的に優れた透明性を持ち、かつ超微粒子を2次凝集が従来になく低減された状態で含有する光硬化性組成物を、良好な生産性のもとに与える技術を提供する。 - 特許庁