| 摘要 |
A plastic lens exhibiting excellent ability of absorbing ultraviolet light having a wavelength of about 400 nm, suppressed coloring and excellent transparency and a process for producing the plastic lens are provided. The plastic lens comprises a plastic lens substrate obtained by polymerizing a composition comprising (A) a lens material monomer, (B) a cobalt compound expressed by CoO·Al 2 O 3 and/or Co·Al 2 O 4 , (C) fine particles of Au having an average diameter of 1 to 1,000 nm and (D) at least one ultraviolet light absorber selected from benzophenone-based ultraviolet light absorbers and benzotriazole-based ultraviolet light absorbers. The process comprises mixing Component (A), a dispersion of a cobalt compound which comprises Component (B), a dispersion of fine particles of Au which comprises Component (C) and Component (D), and polymerizing the obtained composition to prepare a plastic lens substrate.
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