Sayyidah Aishah bint Qudamah bin Maz'un (may Allah be pleased with her) said that the Messenger of Allah (peace and blessings be upon him) said: "It is grievous to Allah that He should take the two precious things of a Muslim and then still admit him into Hell." Meaning his two eyes.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21226