When scars, abrasions or other anomalies are detected one often wants to know how deep they go into the cornea or at what level the anomaly is located. This is when an optic section is used. The optic section is a very thin parallelepiped and optically cuts a very thin slice of the cornea. The distance from the front and back of the section gives you the location within the cornea. The epithelium (front surface of the cornea) gives a bright reflection. With high magnification a speckle pattern is seen within the normal stroma. The back of the optic section is the endothelium.
