diagram illustrating stages of visual acuity from the ophthalmological manual by Fat? al-D?n al-Qays? dedicated to the Ayyubid ruler of Egypt from 1240 to 1249. The copy was completed on 5 Jumadá I 907 [ 16 November 1501].

---

Size: 5382px × 3897px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 10th, 13th, 16th, acuity, al-?, al-qays?, archival, archive, ayyubid, century, diagram, egypt, egyptian, fat?, historical, history, illustrating, illustration, jumadá, manual, medicine, ophthalmological, ruler, science, stages, visual