Unaysah bint Zayd bin Arqam narrates from her father that the Prophet (peace and blessings be upon him) came to visit him during an illness he had, and said: "There is no danger for you in this illness of yours, but how will it be with you when you live on long after me and become blind?" He said: "Then I will hope for the reward and be patient." He said: "Then you will enter Paradise without reckoning." So he became blind after the death of the Prophet (peace and blessings be upon him), then Allah restored his sight to him, then he passed away, may Allah have mercy on him.
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5107