It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him); he said: My eyes became inflamed, and the Messenger of Allah (peace and blessings be upon him) came to visit me. He (peace and blessings be upon him) said: "O Zayd! If your eyes were to remain as they are, what would you do?" I said: I would be patient and hope for the reward. He said: "O Zayd! If your eyes were to remain as they are and you were patient and hoped for the reward, there would be no reward for you less than Paradise."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5033