Sahih Muslim Book 007, Hadith Number 2743.
Chapter : The Muhrim is permitted to get the treatment for his eyes.
Nubaih b Wahb reported that the eyes of Umar b. Ubaidnllah b. Ma'mar were swollen, and he decided to use antimony. Aban b. 'Uthman forbade him to do so and commanded him to apply aloes on them, and reported on the authority of 'Uthman b. Affan that the Apostle of Allah (may peace be upon him) had done that.