presbyopia, presbyopic; presbytia, presbytic, presbytism 1. A form of farsightedness occurring after middle age, caused by a diminished elasticity of the crystalline lens. 2. The physiological loss of accommodation in the eyes in advancing age, said to begin when the near point has receded beyond 22 cm (9 inches). 3. The loss of the eye's ability ... Found on http://www.wordinfo.info/words/index/info/view_unit/1748/