The periphery of the retina is visualized with
Indirect binocular ophthalmoscopy
Direct ophthalmoscopy
Contact lens
Goldman's three mirror contact lens
The technique of examining the fundus of the eye is called ophthalmoscopy. In indirect ophthalmoscopy, a real and inveed image is formed between the condensing lens and the observer. The advantage of stereopsis (depth perception) and a larger field of view makes indirect ophthalmoscope (IDO) more useful both in retina clinics and during posterior segment surgeries. Reference : A K KHURANA Comprehensive Ophthalmology; edition 4; page-567
Anatomy, Development and clinical examination