What Is Corneal Disease?
Cataract surgery is a common procedure that aims to remove the
cloudy lens in the eye and replace it with an artificial one. Cataracts are
usually caused by age-related changes in the eye, but can also be caused by
genetics, injury, or other medical conditions.The surgery is typically performed
on an outpatient basis using local anesthesia. The surgeon will make a small
incision in the eye and use ultrasound technology to break up the cloudy lens
into small pieces that can be removed. Once the cataract has been removed, a new
intraocular lens (IOL) is implanted to replace the natural lens.
Corneal disease can take many forms, and some of the most
common types include:
Corneal Abrasion: A scratch or injury to the cornea that can cause pain,
redness, and tearing.
Keratitis : An inflammation of the cornea that can be caused by
infection, injury, or an underlying medical condition.
Corneal Dystrophy: A group of inherited conditions that cause abnormal
accumulation of material in the cornea. Symptoms may include clouding of the
cornea, reduced vision, and glare or halos around lights.
Corneal Ulcer: An open sore on the cornea, often caused by infection.
Symptoms may include pain, redness, tearing, sensitivity to light, and blurred
vision.
Fuchs' Dystrophy: A condition in which the cells that line the inner
surface of the cornea slowly die off, leading to swelling and clouding of the
cornea. Symptoms may include blurry or hazy vision, glare, and sensitivity to
light.
The Three Main Layers Of The Cornea Are
1. Epithelium: This is the outermost layer of the cornea. It is a thin layer
of cells that acts as a protective barrier against the environment. The epithelium
also helps to absorb oxygen and nutrients from tears and distribute them to the
underlying layers of the cornea.
2. Stroma: This is the thickest layer of the cornea and comprises about 90%
of its thickness. It consists of collagen fibers arranged in a specific pattern that
gives the cornea its strength and clarity. The stroma is responsible for most of the
cornea's refractive power.
3. Endothelium: : This is the innermost layer of the cornea, which is a
single layer of cells that helps to maintain the transparency of the cornea by
regulating the amount of fluid that enters and leaves the stroma. The endothelium
also pumps excess water out of the cornea to keep it from becoming swollen or hazy.
