Research progression in correction of presbyopia eye

Presbyopia is an age-related difficulty in reading because of the natural loss of accommodation that affects the majority of middle-aged individuals.Its mechanism is not identifiable,but presbyopia represents one of the major challenges facing refractive surgery today.The correcting methods include wearing of glasses,medicine or surgeries on cornea,sclera or lens,but no one can reverse the development of presbyopia.This article is an attempt to review the the research progression and correction methods of presbyopia. Key words: Presbyopia;  Laser in situ keratomilileusis;  Visual quality