The Cornea
Light from the world around you enters your eye through the clear cornea. Most light focusing occurs between air and its curvature. It consists of several layers of clear living cells and collagen.
Corneal Ulcers
The normal cornea is clear and provides clear vision. Abrasion, infection, dryness, burns, or chemicals can damage the cornea. An epithelial defect is superficial damage to the outer cell layer of the cornea. A deep corneal ulcer is more severe damage to stromal cells as new vessels may form.
Summary
Any damage, injury, or concern about your cornea should be brought to your eye care provider’s attention immediately. Any changes to your vision should also be brought to your eye care provider’s attention immediately.