Patent ID: 7506977

Claim:
A plastic spectacles lens comprising a plastic lens wafer formed from a thermosetting or thermoplastic resin or the plastic lens wafer and one, or two or more component layers formed on at least one side of the plastic lens wafer, either the plastic lens wafer or at least one of the component layers comprising an organic dye which exhibits a sharp absorption satisfying the following conditions (A), whereby the plastic spectacles lens need not substantially contain a rare earth metal: and the conditions (A) are made up as follows: the visible ray absorption spectrum measured in a chloroform or toluene solution of the organic dye has a main absorption peak (P) between 565 nm and 605 nm, the coefficient of absorption index (ml/g·cm) of the apex (Pmax: a point at which the coefficient of absorption is maximum) is 0.5×10 5 or more, the peak width at ¼ of the absorption at the apex (Pmax) of the peak (P) is 50 nm or less, the peak width at ½ of the absorption at the apex (Pmax) of the peak (P) is 30 nm or less, and the peak width at ⅔ of the absorption at the apex (Pmax) of the peak (P) is 20 nm or less.