<p style='text-align: justify;'>Leaf from a copy of ʿAlī ibn ʿĪsā, Taḏkirat al-kaḥḥālīn (‘Memorandum for opticians’), third discourse, end of chapter 12 and heading of chapter 13 (ed. Hyderabad 1964, pp. 302-304), dealing with the dilatation of pupils and ailments of the optical nerve.</p>