Pterygium Surgery

At our centre all Pterygium surgeries are done by the newest technique of plastic surgery. In this technique, as in conventional method, excision of Pterygium tissue is performed first. In the same sitting, autografting of conjunctiva is done by using either sutures or biological glue. This helps in reducing chances of recurrence.

Use of Spectacles
Most people choose to wear eyeglasses to correct their vision. The lenses in the eyeglass frames are specially ground to correct for Myopia, Hyperopia, Astigmatism or other vision abnormalities. The   eyeglasses adjust the incoming image so that the eye’s cornea and lens can focus a clear image on the retina at the back of the eye.
Lens Materials
There are three common materials used for spectacle lenses today: glass, fiber and polycarbonate plastic. None of these materials is ideal for use in all situations; each has its pros and cons.
(A)  Glass lenses
Pros: They are the hardest of the three. They do not scratch easily, and are the cheapest.
Cons: Glass lenses are heavy, weighing 2 to 3 times as much as the other lens types. They are also the most breakable. Hence they are not recommended for children, who tend to be hard on their glasses.
(B) Fiber lenses
Pros: They are the most commonly used lenses. They are half the weight of glass. They are safer than glass and more durable. Additional features, like anti-glare coating and progressive (multifocal) design can be added to this material. Only fiber lenses can be fitted to rimless frames. 
Cons: The major disadvantage of fiber lenses is that they scratch easily. There are some scratch-resistant coatings which can reduce this problem. They are more expensive than glass lenses.
(C) Polycarbonate plastic lenses
Pros: They are the most impact-resistant, so they are a good choice for safety eye wear, sports and children’s glasses. They are also the lightest; so they are comfortable to wear.
Cons: It is the softest lens material. Hence it scratches quite easily. These lenses are the most expensive.

Lens Designs

There are three lens designs to choose from 1. Monofocal 2. Bifocal and 3. Multifocal or Progressive.

Monofocal lenses have only one number (either distant or near) and are used most frequently. It has lens for    either distant or near vision. Those under 40 years can see things at near distance also with the specs for distant vision; hence only  monofocal lens is used. Those over 40 years who have only presbyopic number can use  monofocal lens. Those over 40 years who are willing to keep separate specs for near and    distant vision can also use monofocal lens.