_:vb50956678 . _:vb50956678 . _:vb50956678 . _:vb50956678 "A cataract that is characterized by thickening and loss of transparency of the lens with age progression, caused by a multifactorial etiology related to aging."^^ . _:vb50956678 . _:vb50956678 "url:https://eyewiki.aao.org/Cataract"^^ . _:vb50956678 .