<p style='text-align: justify;'>Page from a Judaeo-Arabic version of ʿAlī ibn ʿĪsā, Taḏkirat al-kaḥḥālīn (‘Memorandum for opticians’) third discourse, chapter 5, on long-sightedness and beginning of chapter 6 on shortsightedness (ed. Hyderabad 1964, pp. 293-295).</p>