Abu Dawud said: Yahya b. Ma'in said to me: This tradition about the use of collyrium is munkar (i.e. contradicts the sound traditions on the subject).
In-book : Book 14, Hadith 65
English translation : Book 13, Hadith 2371
14. Fasting (Kitab Al-Siyam)
باب فِي الْكَحْلِ عِنْدَ النَّوْمِ لِلصَّائِمِ