Patience when one loses their eyesight
Anas (radi Allahu anhu) said: I heard the Messenger of Allah (sal Allahu alaihi wa sallam) saying, “Allah, the Glorious and Exalted said: ‘When I afflict my slave in his two dear things (i.e., his eyes), and he endures patiently, I shall compensate him for them with Jannah.”
Blindness is the greatest deprivation in the world and Allah grants its reward according to His Pleasure. For this reason patience in this case is highly meritorious. Its reward is Jannah provided the blind is enormously rich in Faith.
And Allah Knows Best!