It is narrated from Sayyiduna al-Irbad bin Sariyah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Allah, the Mighty and Majestic, says: "When I take My servant's two precious things (his eyes) and he grieves over losing them, I am not pleased with any reward for him less than Paradise, provided that he praises Me for it."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15734