According to Khulusi, the greatest Eastern contribution to medicine from the 10th century was in the field of ophthalmology. As late as the first half of the 18th century the translated treatises of Ammar ibn Ali of Mosul were the most authoritative books on eye disease in Europe. His publications were complemented by those of Abu 'Ali al-Hasan ibn al-Haytham al-Basri (Latinized name: Alhazen, d.1020) who produced work that was fundamental to the advancement of optics.