Optical lens that contains thermoplastic resin

An optical lens, comprising a thermoplastic resin consisting essentially of a constituent unit (A) derived from a monomer represented by the following general formula (1), and a constituent unit (B) derived from BPEF or BPPEF represented by each of the following structural formulae,

• wherein the molar ratio (A:B) between the constituent unit (A) and the constituent unit (B) is 5:95 to 79:21,
• wherein R1 to R4 each independently represent a hydrogen atom, a halogen atom, an optionally branched alkyl group containing 1 to 10 carbon atoms, an alkoxy group containing 1 to 10 carbon atoms, or an aryl group containing 6 to 15 carbon atoms, and
• and the thermoplastic resin further comprises a constituent unit (C) derived from BCFL represented by the following structural formula:
• wherein the thermoplastic resin has a refractive index (nD) of 1.600 to 1.660 and an Abbe number of 21.0 to 27.0.