For the health of eyes

In order to keep one’s eyes healthy, Ayat al-Kursi should be recited after prayers, following which, one must put his hands on his eyes and say, "Allāhumma ihfaz hadaqatayya bihaqqi hadaqatay ‘Alī bin Abi Ṭālib Amīr al-Mu’minīn ‘alayhi as-salām. (O God, protect my two eyes for the sake of the two eyes of Ali ibn Abi Talib, the commander of the Faithful, peace be upon him!)