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  →  Diabetic Retinopathy

Diabetic Retinopathy

Diabetic Retinopathy


DIABETES MELLITUS is a condition that impairs the body’s ability to use and store sugar (glucose). Sugar is excreted in the urine and the blood sugar is abnormally high. It causes changes in small blood vessels in various organs of the body. Diabetes can cause various changes in the eye as well, particularly in the retina. Diabetic eye disease can cause severe vision loss or even blindness. At Greenss Medical Centre, we have a dedicated team of Vitreo-Retinal specialists committed to provide you with the best possible care to protect your vision.

WHAT IS DIABETIC RETINOPATHY?

When the retina is affected by diabetes, weakened blood vessels may leak fluid or blood, causing damage to the retina. This is called DIABETIC RETINOPATHY.

There are two forms of diabetic retinopathy. In BACKGROUND RETINOPATHY, blood vessels within the retina become abnormally permeable and allow substances like fluid and lipid to leak out. This results in water logging or edema of retinal tissue and deposition of yellowish material called exudates. If the leaking fluid collects in the macula (the central part of the retina responsible for reading vision and other fine tasks), vision gets affected, often to a marked degree.

The second form is PROLIFERATIVE RETINOPATHY. Abnormal fragile ‘new’ blood vessels grow on the surface of the retina or optic nerve and sometimes into the vitreous cavity. These fragile vessels may rupture and bleed into the normally clear vitreous gel, blocking light from reaching the retina. Subsequent scar formation in the vitreous may pull on the retina, detaching it from the back of the eye (traction retinal detachment). Severe loss of sight, blindness, and even painful glaucoma can result from these conditions.

WHAT ARE IT'S SYMPTOMS?

Please note that every person with diabetes need not have Diabetic Retinopathy. Conversely an eye with marked changes of Diabetic Retinopathy can have good vision and be totally free of symptoms. Hence it is important for all diabetics to undergo REGULAR EYE CHECK-UP INCLUDING RETINAL EXAMINATION THROUGH DILATED PUPILS especially for people who have been diabetic for a number of years. It is also true that diabetes is often detected in a person, when some changes of retinopathy are seen on routine examination of the eye. Reduced central vision can occur if the macula gets edematous (swollen). Black spots (floaters) and cobwebs of sudden onset often point to a minor bleed inside the eye. Sudden total loss of vision may occur due to a large bleed into the vitreous.

PREVENTION OF DIABETIC RETINOPATHY?

LOSS OF VISION FROM DIABETIC RETINOPATHY IS LARGELY PREVENTABLE.

EARLY DETECTION of diabetic retinopathy is the best protection against sight loss. This is possible by having a complete eye examination including retina check-up once a year or more frequently if advised. In most cases the ophthalmologist can then begin treatment before sight is affected.

Excellent control of diabetes and associated conditions like hypertension, increased blood lipids & cholesterol and renal (kidney) disease, is strongly recommended. However, good control in itself does not guarantee freedom from diabetic retinopathy.

HOW IS DIABETIC RETINOPATHY TREATED?

PHOTOCOAGULATION involves the use of a LASER beam to seal leaking blood vessels and prevent growth of abnormal blood vessels. This procedure does not require hospitalization. In background retinopathy, if blood vessels are leaking fluid into the macula, laser treatment stops the leakage and may improve or stabilize vision. In proliferative retinopathy, laser treatment may involve one or more sessions depending on the type and severity of retinopathy. Laser treatment significantly reduces the chances of severe visual loss by destroying the abnormal blood vessels and preventing growth of more such vessels. Vision may improve or stabilize within several weeks to a year. It is important to remember that laser treatment is not a one-time procedure. Regular follow up is extremely important. Your doctor will tell you when to return for a check-up.

Recently, along with laser treatment, certain medication when injected into the eye or just outside the eye has shown encouraging results. These medicines include intravitreal Avastin, lucentis as well as steroids. They often need to be repeated in order to keep the swelling in check. Being injected into the eye they are however to be used cautiously and judiciously.

If the vitreous is too clouded with blood or there is traction retinal detachment, laser treatment will not work. In this situation, a surgical procedure called VITRECTOMY needs to be performed. In this operation, opaque vitreous gel is removed from within the eye by a special instrument that simultaneously sucks and cuts the vitreous.

Eye Care

  • Cataract Surgery
  • Refractive Surgery (iLasik)
  • Glaucoma
  • Squint
  • Contact Lens
  • Retina & Vitreous
  • Pediatric Ophthalmology
  • Diabetic Retinopathy
  • Uveitis & Ocular Inflammation
  • Macular Degenration
  • Occuplasty
  • Dry Eye Syndrome
  • Low Vision Aid
  • Common Eye Diseases
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