The human eye is a sense or can be said as a visionary organ that reacts to light and allows vision. The eye consists of cornea, pupil, lens, sclera, conjunctiva and more. These all parts help us see clearly.

The cornea is the front part of the eye that is transparent and covers the iris, pupil, and anterior chamber. It lies directly in front of the iris and pupil. The cornea works together with the anterior chamber and lens and refracts light, with the cornea accounting for approximately two-thirds of the eye's total optical power. The average cornea has a center thickness of about 550 microns, or slightly more than half a millimeter. Along with the sclera (white of the eye), the cornea serves as a barrier against dirt, germs and other particles that can harm the eye's delicate components. The cornea also filters out some amounts of the sun's ultraviolet light.

The cornea also plays a key role in vision. As light enters the eye, it's refracted, or bent, by the outside shape of the cornea. The curvature of this outer layer helps determine how well your eye can focus on objects close up and far away. If there is any damage caused to cornea due to disease, infection or injury, the resulting scars or discoloration can interfere with vision by blocking or distorting light as it enters the eye.

The three main layers of the cornea are:

  • Epithelium: The epithelium stops outside matter from entering the eye. This layer also absorbs oxygen and nutrients from tears.
  • Stroma: It is the thickest layer of the cornea and is located behind the epithelium. Stroma consists of water and proteins that give it an elastic but solid form.
  • Endothelium: The endothelium is a single layer of cells located between the stroma and the aqueous humor, the clear fluid found in the front of the eye. The endothelium works as a pump, expelling excess water as it is absorbed into the stroma. Without this specialized function, the stroma could become waterlogged and hazy and 
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NOTE: Above More accurate treatment cost estimates can be provided if medical reports are emailed to us or after the patient is examined by doctors after arrival at hospital in India and medical tests are done after admission.

Frequently asked questions about Cornea

What is the cornea?

The cornea is the front part of the eye that is transparent and covers the iris, pupil, and anterior chamber. It lies directly in front of the iris and pupil.

What is corneal blindness?

When there is any damage to cornea or if it becomes cloudy, light cannot penetrate the eye to reach the retina. It results in poor vision or blindness.

What are the causes of corneal blindness?

Corneal blindness is caused due to birth defects, Injuries to the eye, malnutrition, infections, chemical burns, congenital disorders and complications of eye surgery.

What are the symptoms of corneal conditions?

Symptoms are as follows

  • Redness
  • Pain
  • Blurred vision
  • Corneal scarring
  • Tearing
What is Cornea transplant?

A cornea transplant replaces diseased or scarred corneal tissue with healthy tissue from an organ donor. A cornea transplant can reinstate vision, reduce pain, and improve the appearance of a damaged or diseased cornea. 

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Symptoms of corneal conditions
With its ability for quick repair, the cornea usually heals after most injury or disease. However, when there is deep injury to the cornea, the healing process may be prolonged, possibly resulting in a variety of symptoms, including:

  • Redness
  • Pain
  • Blurred vision
  • Tearing
  • Extreme sensitivity 
  • Corneal scarring

If you experience any of these symptoms, kindly consult an ophthalmologist (eye doctor). 

The Corneal conditions are as follows:

  • Corneal abrasion - a medical condition involving the loss of the surface epithelial layer of the eye's cornea as a result of trauma to the surface of the eye.
  • Corneal dystrophy – During this condition, one or more parts of the cornea due to a buildup of cloudy material lose their normal clarity.
  • Corneal ulcer - an inflammatory or infective condition of the cornea involving disruption of its epithelial layer with involvement of the corneal stroma.
  • Corneal neovascularization - excessive in growth of blood vessels from the limbal vascular plexus into the cornea, caused by deprivation of oxygen from the air.
  • Fuchs' dystrophy - cloudy morning vision.
  • Keratitis - inflammation of the cornea.
  • Keratoconus - a degenerative disease, the cornea thins and changes shape to be more like a cone.
  • Corneal Foreign body- one of the most common preventable occupational hazards.
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