| ICD9 = | MeshID = D011305 | }} Presbyopia (Greek word "presbys" (πρέσβυς), meaning "old man" or "elder", with Latin root "-opia", meaning "eye") describes the condition where the eye exhibits a progressively diminished ability to focus on near objects with age. Presbyopia's exact mechanisms aren't known with certainty, however, the research evidence most strongly supports a loss of elasticity of the crystalline lens, although changes in the lens's curvature… (More on Presbyopia)