Health Safety Notification

Due to COVID-19 and per CDC guidelines, we are seeing patients on a modified schedule. Patients are required to wear a mask or face covering while in clinic. Unfortunately due to the PPE shortage, EANW cannot provide masks to patients. Upon arrival to the clinic, you will be asked if you have experienced a fever, cough, shortness of breath, sore throat, and/or sudden loss of taste or smell within the past 14 days. We will also take your temperature. All visitors will be asked to wait in the car, unless they are needed for the appointment (caregiver, interpreter, etc.).

Cornea

The cornea is the front of the eye ball. It is very strong and crystal clear. It is curved in a way which makes it a very high power lens, capable of focusing light on the retina at the back of the eye. Anything which effects the clarity or uniform curvature of the cornea will decrease vision. The three main layers of the cornea are the epithelium, stroma, and endothelium. Examples of diseases of these individual layers are given below.

Cornea

Cornea Disease

Epithelial Disease: Recurrent Erosion

A corneal scratch damages the epithelial layer of the cornea. Fortunately, this layer constantly replaces itself and will heal without scarring. Occasionally, the epithelium heals across but is poorly adherent to the underlying stroma. It can pull away, often in the middle of the night or upon awakening in the morning. This is usually treated with a lubricating ointment, but sometimes requires surgical treatment.

Stromal Disease: Keratoconus

Keratoconus is caused by a weakened stroma which allows the cornea to stretch forward as a cone. This can lead to marked vision decrease. It is usually treated with rigid contact lenses, but might require surgical correction.

Endothelial Disease: Fuchs Endothelial Dystrophy

The endothelium is the very thin, innermost layer of the cornea which is very

important in keeping the cornea crystal clear. These very active cells are

gradually lost throughout life and they do not replace themselves. If the number

of endothelial cells drops below a critical number the cornea will swell and

become cloudy. Corneal swelling is treated surgically with a corneal transplant

from a human donor.