Diabetic Eye Care

Commonly Asked Questions

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What is Diabetic Retinopathy?
Many diabetics are not aware that high blood sugar levels can damage blood vessels in the retina. That damage is referred to as Diabetic Retinopathy. Although half of all American diabetics are affected by Diabetic Retinopathy, 90% of those people can be saved from blindness.

Early detection allows doctors to monitor the condition of the retina while patients begin more intense management of their blood sugar levels. Dr. Daniel E. Bustos and Dr. Peter Lam at Victoria Eye Center monitor diabetic patients and provide treatment when necessary.

Daniel E Bustos

Daniel E. Bustos, MD
Comprehensive Ophthalmologist

Peter Lam Md

Peter Lam, MD
Comprehensive Ophthalmologist
Corneal Specialist


How does Diabetic Retinopathy damage the retina?
Diabetic retinopathy occurs when diabetes damages the tiny blood vessels in the retina. Most people do not notice any changes in their vision. Another condition, Macular Edema, occurs when the damaged blood vessels leak fluid and lipids onto the macula, the part of the retina that lets us see detail. The fluid makes the macula swell, blurring vision.

As the disease progresses, it enters its advanced (proliferative) stage. At that point, fragile new blood vessels grow along the retina and in the clear gel that fills the eye. Without timely treatment, these new blood vessels can bleed, cloud vision and destroy the retina.

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What are the symptoms of Diabetic Retinopathy?
Diabetic Retinopathy often has no early warning signs. At some point, your vision will blur from Macular Edema, making it hard to do things like read and drive. Your vision may fluctuate from better to worse at times. As the conditions worsen, you may start to experience:

  • Blurry central vision
  • Patchy blind spots
  • Dull colors
  • Wavy central vision
  • Blindness

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How is Diabetic Retinopathy detected?
Diabetic Retinopathy is detected by your doctor during an extensive eye exam that includes a visual acuity test, pupil dilation and tonometry. If your doctor suspects that you have Macular Edema, they will perform an OCT (optical coherence tomography scan) or fluorescein angiography to locate the leaking blood vessels that need treatment.

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How is Diabetic Retinopathy or Macular Edema treated?
There are two treatments for Diabetic Retinopathy depending on the progression of the disease.They are both effective in reducing vision loss from this disease.

  • Laser surgery may be performed to treat the leaking blood vessels. Your pupil is dilated and numbing drops are applied to the eye.
  • If there is so much vitreous hemorrhage (bleeding/leaking of vessels) that laser surgery is not possible, or if the blood does not disappear on its own after a period of observation, it can be removed with an operation called a Vitrectomy. The procedure is performed under anesthesia at Victoria Surgery Center. The blood-filled vitreous gel is removed and replaced with a salt solution that is compatible with the eye.

Patients who have Macular Edema may need injection treatments of EYLEA® to gain improvement in their vision. These injections can help control leakage of blood vessels into the layers of the retina. In clinical trials, patients who received EYLEA injections were able to read 10-15 additional letters on the eye chart 1-2 years after treatment.