Nabi bin Wahb reported,
We set out with Abban bin Uthman, and when we reached Malal, Umar bin Ubaydullah complained of pain in his eyes. By the time we reached al-Rawha, the pain had grown severe, so he sent word to Abban bin Uthman asking him about it.Abban sent back the reply, "Apply aloes as a poultice to them, for Uthman 
reported from the Messenger of Allah ﷺ concerning a man who complains of pain in his eyes while in the state of ihram, that he should apply aloes as a poultice to them."
Azami 4822
Sahihعن نبيه بن وهب، قال
خرجنا مع أبان بن عثمان حتى إذا كنا بملل اشتكى عمر بن عبيد الله عينيه، فلما كنا بالروحاء اشتد وجعه، فأرسل إلى أبان بن عثمان يسأله، فأرسل إليه أن اضمدهما بالصبر فإن عثمان رضي الله عنه حدث عن رسول الله ﷺ في الرجل إذا اشتكى عينيه وهو محرم ضمدهما بالصبر.
Muslim narrated it in his chapter on Hajj (1204), via Sufyan bin Uyayna and Abdul-Warith bin Saeed - each separately - from Ayub bin Musa, who said, Nabih bin Wahb narrated to me, and so on.Al-sabr (aloe) is the extract of a bitter tree, its singular form being sabrah and its plural subur.Tirmidhi said, "This is the practice among the people of knowledge, they see no harm in a person in the state of ihram for Hajj treating himself with a medicine, as long as it contains no perfume."