Laser photocoagulation - eye
Laser photocoagulation is eye surgery using a laser to shrink or destroy abnormal structures in the retina, or to intentionally cause scarring.
Your doctor will perform this surgery at an outpatient or office setting.
Photocoagulation takes place by using the laser to create a microscopic burn in the target tissue. The laser spots are usually applied in 1 of 3 patterns.
Before the procedure, you will be given eye drops to dilate your pupils. Rarely, you will get a shot of a local anesthetic. The shot may be uncomfortable. You will be awake and pain-free during the procedure.
- You will be seated with your chin in a chin rest. A special lens will be placed on your eye. The lens contains mirrors that help the doctor aim the laser. You will be instructed to look straight ahead or at a target light with your other eye.
- The doctor will aim the laser at the area of the retina needing treatment. With each pulse of the laser, you will see a flash of light. Depending on the condition being treated, there may be only a few pulses, or as many as 500.
Why the Procedure Is Performed
Diabetes can harm the eyes by causing diabetic retinopathy. It is one of the most common eye diseases that needs laser photocoagulation. It can damage the retina, the back part of your eye. The most severe from of the condition is proliferative diabetic retinopathy, in which abnormal vessels grow on the retina. Over time, these vessels can bleed or cause scarring of the retina.
Diabetes can harm the eyes. It can damage the small blood vessels in the retina, the back part of your eye. This condition is called diabetic retin...Read Article Now Book Mark Article
The retina is the light-sensitive layer of tissue at the back of the eyeball. Images that come through the eye's lens are focused on the retina. Th...Read Article Now Book Mark Article
In laser photocoagulation for diabetic retinopathy, laser energy is aimed at certain areas of the retina to prevent abnormal vessels from growing or shrink those that may already be there. Sometimes it is done to make edema fluid in the center of the retina (macula) go away.
This surgery may also be used to treat the following eye problems:
Since each pulse of the laser causes a microscopic burn in the retina, you may develop:
- Mild loss of vision
- Reduced night vision
- Blind spots
- Reduced side vision
- Difficulty focusing
- Blurred vision
- Reduced color vision
If not treated, diabetic retinopathy can cause permanent blindness.
Before the Procedure
Special preparations are rarely needed before laser photocoagulation. Usually, both eyes will be dilated for the procedure.
Arrange to have someone to drive you home after the procedure.
After the Procedure
You vision will be blurry for the first 24 hours. You may see floaters, but these will subside over time. If your treatment was for macular edema, your vision may seem worse for a few days.
Laser surgery works best in the early stages of vision loss. It cannot bring back lost vision. However, it can greatly reduce the risk of permanent vision loss.
Diabetes is a long-term (chronic) disease in which the body cannot regulate the amount of sugar in the blood.Read Article Now Book Mark Article
Protect your vision
Diabetes can harm your eyes. It can damage the small blood vessels in your retina, which is the back part of your eye. This condition is called dia...Read Article Now Book Mark Article
Franklin W. Lusby, MD, ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
Brownlee M, Aiello LP, Sun JK, et al. Complications of diabetes mellitus. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 37.
Flaxel CJ, Adelman RA, Bailey ST, et al. Diabetic retinopathy preferred practice pattern. Ophthalmology. 2020;127(1):P66-P145. PMID: 31757498 pubmed.ncbi.nlm.nih.gov/31757498/.
Lim JI. Diabetic retinopathy. In: Yanoff M, Duker JS, eds. Ophthalmology. 5th ed. Philadelphia, PA: Elsevier; 2019:chap 6.22.
Mathew C, Yunirakasiwi A, Sanjay S. Updates in the management of diabetic macular edema. J Diabetes Res. 2015;2015:794036. PMID: 25984537 pubmed.ncbi.nlm.nih.gov/25984537/.
Wiley HE, Chew EY, Ferris FL. Nonproliferative diabetic retinopathy and diabetic macular edema. In: Schachat AP, Sadda SVR, Hinton DR, Wilkinson CP, Wiedemann P, eds. Ryan's Retina. 6th ed. Philadelphia, PA: Elsevier; 2018:chap 50.