👉 Diaphanoscopy is a medical procedure that involves using a light source to examine the eyes in order to diagnose and treat eye diseases. It uses a special lens called a "diaphragm" to focus the light onto the cornea, the clear outer layer of the eye. The diaphragm is placed over the pupil of the eye, which is the small hole that opens the pupil. This allows the light to pass through the pupil and into the cornea, where it can be examined
