what is diabetic retinopathy

Diabetic Retinopathy is a condition caused by diabetes that refers to damaged blood vessels inside the eye retina. These vessels leak fluid into the retina and the macula, and often cause the region to swell and actually bulge out, resulting in blurred vision. Up to 80% of all patients who have had diabetes for 10 years or more will experience some form of diabetic retinopathy. If left untreated, this ailment can lead to blindness.

Risk Factors of Diabetic Retinopathy

  • Suffering from Type I or Type II diabetes for 10+ years
  • High blood pressure
  • Frequent high blood sugar levels
  • High cholesterol
  • Smoking
  • Pregnancy

Diabetic Retinopathy Symptoms and Stages

Diabetic retinopathy does not offer any real warning signs, as there are no glaring symptoms experienced in the first stage of the disease. In some early cases, the vessels have already started to bleed, while leakage into the retina and macula can happen in any and all stages of diabetic retinopathy. The condition can only be detected early on by fundus photography; a procedure which shows microscopic blood-filled bulges in the artery walls. For those with reduced vision, fluorescein angiography can be used to take a picture of the back of the patient’s eye.

In its second stage , abnormal new blood vessels will begin to form at the back of the eye, and can burst and bleed. This is when vision becomes blurred. Patients may also see spots floating in their visual field, which will disappear after a few hours. A few weeks later, vision will be further destructed by a greater amount of blood leakage. These hemorrhages will increase with time and happen most often while the patient is sleeping.

In the third and final stage of diabetic retinopathy (also called proliferative diabetic retinopathy ) the damaged blood vessels begin to grow along the retina due to a lack of oxygen. This will distort the patient’s vision so that items appear wavy, and straight lines look crooked or bent. Without treatment, these new blood vessels will bleed and eventually destroy the retina.

Treatments for Diabetic Retinopathy

Although there is no absolute cure, three highly effective treatments do exist for reducing vision loss in advanced cases of diabetic retinopathy.

Focal Laser Surgery

In advanced cases, laser surgery is used to burn the abnormal blood vessels that form in the retina, in order to stop or slow the leakage or blood or fluid into the eye. Laser surgery has been shown to reduce the risk of severe vision loss by 50%.

Panretinal Photocoagulation

PRP, also called scatter laser treatment, is a more aggressive laser surgery that aims to burn between 1,200 to 1,800 individual laser spots over multiple sessions. The ophthalmologist numbs the eye with anesthetic and holds a special lens on the eye, using a single spot laser or pattern scan laser to burn the retina. This will, hopefully, reduce the retina’s oxygen demand and save the center of the patient’s sight, although some peripheral vision may be lost.

Vitrectomy Surgery

This surgery is used in cases where there is too much blood leakage in the center of the eye. Vitrectomy is done under local anesthesia. The surgeon makes an incision into the sclera, which is the white of the eye. Next, an instrument is used to drain the vitreous and replace it with saline solution. Patients who have this surgery may be asked to stay overnight in the hospital. For follow-up, patients will need to wear an eye patch for a few days or weeks to protect the eye.

Those suffering diabetic retinopathy will need medical monitoring and ongoing treatments to maintain their vision. However, with any of these three treatments used early, people with advanced diabetic retinopathy have a 90% chance of retaining their vision.

 


 

 

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