The abrasion affects your cornea, which is the clear layer that covers the iris — the colored part of your eye. It also shields the pupil, which is the black circle in the middle of your eye.

The cornea is the dome-shaped window to the eye and needs to be smooth and regular shaped to see well. In certain conditions, the cornea has areas that become weak. When this occurs, the cornea starts ...

BACKGROUND: Shield-shaped corneal ulcers and corneal plaques in ... Spectacle-corrected visual acuity of 20/30 or better was obtained in each eye. CONCLUSIONS: In selected patients, excimer ...