This document discusses direct and indirect ophthalmoscopes. It describes their history, principles, optics, instrumentation, image characteristics, advantages, disadvantages and comparisons. The direct ophthalmoscope works on angular magnification, forming an erect virtual image. The indirect ophthalmoscope makes the eye highly myopic using a strong convex lens, forming a real inverted image between the lens and observer with a larger field of view. Key differences are that direct has higher magnification but smaller field while indirect provides stereopsis and permits full peripheral viewing.