Cornea


Cornea is the anterior most clear dome shaped structure. It is the main refractive structure of the eye.

Common disorders of Cornea

  • Ectatic disorders – Keratoconus etc
  • Infections
  • Opacities, Scars
  • Dystrophies
  • Pterygium
  • Decompensation – Bullous Keratopathy
  • Dry Eyes

Keratoconus


It is a non-inflammatory progressive disorder of cornea, where the cornea bulges forward and becomes irregular and conical in shape. It is frequently associated with eye allergies

Symptoms

  1. Blurred vision
  2. Double vision
  3. Frequent change is glass prescription
  4. Contact lens not fitting properly

How is it Treated


Contact Lenses

Semi-soft and Hard contact lenses such as Piggy Back, RGP, Rose-k lenses, Scleral/ mini Scleral lenses, and Boston contact lenses are specialized rigid contact lenses that sit over the diseased cornea and create an artificial interface, thus reducing diffraction/ refraction of light rays from the irregular cornea and improves vision.

Collagen Cross linking – C3R

It is a minimally invasive procedure to stabilize the cornea and prevent further progression. In this procedure, cornea is prepared with riboflavin drops and exposed to specific UV light for a fixed time period. This causes crosslinking of collagen fibers and thus strengthens the cornea.

Corneal Rings Segments – Intacs

Intra-corneal ring segments are rigid segments implanted within the cornea. They help to reduce the corneal curvature irregularity and thus increase the tolerance to Contact lenses/ glasses and improve visual acuity. It can make the corneal curvature more uniform.

Corneal transplants

In some cases of advanced keratoconus, one may need either partial (DALK), preferably or full-thickness (PKP) transplant. With advanced techniques and more experience, the success rate has highly improved with good visual outcomes.

The cornea is the outmost clear dome like structure of the eye. It is the only part of the eye that can be transplanted. Corneal transplant does not need ABO matching with donor as it is avascular structure.

Types:

Penetrating Keratoplasty (PKP): Here full this corneal tissue is replaced with another donor tissue and secured with sutures. Commonly done for deep opacities, infections, injuries.

Deep Anterior Lamellar Keratoplasty (DALK): In DALK more than anterior 2/3rd of corneal stroma is removed and replaced with donor graft. It is more advanced and skilled technique. Risk of rejection is less, better eye globe stability and allows faster recovery. Done commonly for anterior scars/ opacities, keratoconus and dystrophies.

Endothelial Keratoplasty (EK): In EK only the innermost defective layer is replaced with donor layer. It is most advanced and technically skilled surgery. Offers great outcome, faster recovery and good visual results. Commonly done for decompensated cornea, Fuch’s Dystrophy and earlier failed PKP.

Before & After Keratoplasty Surgery


Before Surgery

After Surgery


Dry Eyes


Dry eye disease is a common condition that occurs when your tears aren’t able to provide adequate lubrication for your eyes. It may occur if you don’t produce enough tears or if you produce poor-quality tears.


Why Precision Eye Hospital?


At Precision Eye Hospital, we encourage and want each patient to discuss with us the technique/implant best suitable for them. Don’t go for the cheapest implant or surgery, see what is best for your eye. Keep in mind, Eye is the most sensitive and important sense organ and can dramatically change the quality of your life.

So Go For what is Best For Your Eye.

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