Albert and Jakobiec's Principles and Practice of Ophthalmology, 4th ed. (Springer Nature) by 
Kanski's Clinical Ophthalmology: A Systematic Approach, 10th ed. (ClinicalKey) by 
Kanski's Synopsis of Clinical Ophthalmology, 4th ed. (ScienceDirect) by 
Vaughan & Asbury's General Ophthalmology, 19th ed. (AccessMedicine) by 
