| abstract |
The present invention relates to a composition for an optical material capable of suppressing generation of inhomogeneity called "stria" in polymerization, in particular, generation of striae in a lens having high optical power or a surface with high radius of curvature, and more specifically relates to a composition for an optical material, comprising: a stabilizer having a mass ratio of dibutyltin dichloride to monobutyltin trichloride of 97.0/3.0 to 100.0/0.0; an episulfide compound; a polythiol compound; and a polymerization catalyst for the episulfide compound. |