Cornea
-Vision's Window, Nurturing the Cornea-
Cornea at
Nethra Foundations
Cornea is the transparent outermost layer of the human eye. Technically speaking, the cornea is not a single layer; it’s made of five delicate membranes that are arranged one below the other. Cornea plays a major role in focussing your vision; its transparency and its curvy shape helps in refracting light from an object in a way that it falls at the perfect spot on the retina thereby enabling sharpness of vision. A cornea transplant is often referred to as a keratoplasty. It can be used to improve sight, relieve pain in a damaged or diseased eye, and treat emergencies such as severe infection or a damaged cornea surface (perforated cornea).
Causes Of Cornea
- Malnutritionn
- Injuries
- Infections
- Acid / Alkali, Burns
- Post operative complications or infections
- Congenital disorders
Question & Answer
What Causes Cataract?
Ageing is the most common cause of cataract. Younger people may also have cataract if they are: Poorly controlled diabetics Present since birth(congenital) or is hereditary Secondary to injury to eye Taking some medications like steroids Had previous eye surgery or have inflammatory eye conditions like uveitis
How does Cataract Affect Vision?
Cataract causes painless blurring vision. Some cataracts may cause glare or haloes. Night driving may become difficult. Frequent eyeglass prescription changes may indicate cataract. Occasionally, double vision in one eye may be due to cataract. These symptoms can be present in other eye problems also, so you need to check with your eye specialist to confirm.
How is Cataract Detected?
Cataract is detected through a comprehensive eye examination by an ophthalmologist, which includes a check for glasses, detailed evaluation of the eye including the cataract, retina, optic nerve to rule out any other problems which may cause vision loss
When must a Cataract be Removed?
Cataract surgery should be considered when a cataract causes enough vision loss to interfere with daily activities such as driving, reading or watching television.
How is Cataract Surgery Performed?
The main technique used to remove a cataract is phacoemulsification. In phacoemulsification, through a small opening 1.8mm -3mm in size in the cornea, an ultrasonic device is used tois break upthe cloudy lens into small pieces and removed from the eye. After the cataract lens is entirely removed, the lens implant is inserted to the same position.Anaesthetic eye drops / injections are used to make the surgery pain free. Advantages of the recent techniques, as in micro incision cataract surgery are- no injections, no bandage and immediate visual rehabilitation.
What are the types of Artificial Lens Implants?
Monofocal and multifocal lens implants are available. With multifocal implants, you may not need eyeglasses for reading. Your eye surgeon will discuss with you and recommend the type of implant that is most suitable for you.