It is narrated from Sayyiduna al-Irbad bin Sariyah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "When I take away a servant's two precious things (his eyes) and he bears it patiently, I am not pleased with any reward for him less than Paradise, provided that he praises (Me) for them."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15724