Polymerizable polyol (allyl carbonate) compositions

Described is a polymerizable organic composition comprising a polyol(allyl carbonate), e.g., diethylene glycol bis(allyl carbonate), and an additive represented by the general formulaR2-O-(R3O)m-(CH2CH2O)n-1-CH2CH2-Xwherein R2 is a monovalent organic radical having a terminal ethylenically unsaturated group, e.g., allyl, R3O is a divalent radical derived from an epoxide other than ethylene oxide, e.g., butylene oxide, m is a number from 0 to 100, n is a number between 3 and 100, and X is selected from halide, hydroxyl, quaternary ammonium groups, the acid groups acetic acid, sulfonic acid, sulfuric acid, isethionic acid and phosphoric acid, salts of said acid groups, alkoxy groups and carboxylic acid ester groups. The additive is present in the composition in an amount at least sufficient such that a polymerizate, e.g., a plus lens, obtained from said composition is substantially free of tinting defects, e.g., ferns and/or moons.