<prompt> Which does not handle free radicals inside lens-Vitamin AVitamin CVitamin ECatalase  <response>: Emzymatic antioxidant mechanisms :- Reduced glutathioe most impoant, glutathione peroxidase, superioxide dismutase, catalase. Non-enzymatic defence mechanisms :- Vitamin C, Vitamin E, and possibly carotenoids. Ref: Various textbooks. 