Using a +20D lens for non-contact slit lamp biomicroscopy of ocular fundus

摘要

Noncontact slit lamp examination of the ocular fundus has been classically done using high power convex lenses like+90D,+78D,and+60D.A real and inverted image of the fundus is formed in between the high power convex lens and the slit lamp.The+20D lens is commonly used for binocular indirect ophthalmoscopy.The authors use this+20D lens