<p style='text-align: justify;'>Passage from ʿAlī ibn ʿĪsā, Taḏkirat al-kaḥḥālīn (‘Memorandum for opticians’), second discourse, end of chapter 64 and beginning of chapter 65 (ed. Hyderabad 1964, pp. 240-242), on the different diagnostics of ulcers and wounds to the cornea.</p>