Using Eye-Drops and applying Kohl to the Eyes while Fasting
Ā’ishah (radiyallāhu ‘anhā) stated: “The Prophet (salallāhu ‘alaihi wasallam) applied kohl in Ramadan while he was fasting.”
Also, Al-Bukhāri mentioned in a chapter heading: “Anas, Al-Hasan and Ibrāhīm saw no problem with a fasting person using kohl.”
So, it is permitted for a fasting person to use kohl. The eyes are not considered as a channel leading to the stomach. The same ruling would, therefore, apply to eyedrops for medicinal purposes. Likewise, is the case for eardrops since neither the eyes nor the ears are channels to the stomach.
 Reported by Ibn Mājah (no. 1678) and declared sahīh by Al-Albāni.
 Bukhāri in Kitāb As-Siyām (Chapter: The Bathing of a Fasting Person). See Fathul-Bāri of Ibn Hajr (4/181) who stated that it was reported by Abdur-Razzāq in his Musannaf with an authentic chain that Al-Hasan said: “There is no problem with a fasting person using kohl.”
 See Tas-hīl Al-Ilmām, vol. 3, of the expert scholar, Shaikh, Dr Sālih Al-Fawzān.