A Patient-Friendly Guide to PRP Laser Treatment for Retinal Disease

Panretinal photocoagulation, commonly called PRP laser, is a type of retinal laser treatment used to help prevent severe vision loss caused by abnormal blood vessel growth in the eye. PRP is most often recommended for patients with proliferative diabetic retinopathy, retinal vein occlusions, ocular ischemic disease, and other conditions that cause poor oxygen supply to the retina. When the retina does not receive enough oxygen, it can produce signals that trigger abnormal new blood vessels to grow. These fragile blood vessels can bleed, scar, and lead to serious vision problems or even retinal detachment.

The retina is the light-sensitive tissue lining the back of the eye that sends visual information to the brain. In PRP laser treatment, many small laser spots are placed in the peripheral (side) retina. This treatment reduces the retina’s oxygen demand and helps decrease the signals that stimulate abnormal blood vessel growth. The goal of PRP is not usually to improve vision, but rather to preserve vision and reduce the risk of severe vision loss or blindness. In studies of proliferative diabetic retinopathy, PRP significantly reduced the risk of severe vision loss.

PRP laser is generally performed in the office or outpatient setting. Before treatment, your eye will be dilated and numbing drops are used to improve comfort. Your retina specialist may place a special contact lens on the eye to help focus the laser. During treatment, you may see bright flashes of light and feel mild discomfort, pressure, or an aching sensation. Depending on how much treatment is needed, the laser may be completed in one visit or spread over multiple sessions.

After treatment, vision may be blurry for several hours because of dilation and laser effects. Some patients notice temporary light sensitivity, mild discomfort, headache, or darker vision for a short period. Most people return to normal activities within a few days, although many retina specialists recommend avoiding driving immediately after treatment because dilation can blur vision.

It is important to understand that PRP laser often works by preventing retinal disease from worsening rather than restoring lost vision. Some patients may still require anti‑VEGF injections, OCT monitoring, fluorescein angiography, or surgery depending on the severity of disease. Follow-up visits are important to monitor whether abnormal blood vessels are shrinking and whether additional treatment is needed.

Although PRP laser is considered safe and highly effective, possible side effects can include temporary blurry vision, reduced night vision, mild loss of side vision, swelling, or rarely worsening bleeding. Contact your retina specialist immediately if you experience severe pain, sudden vision loss, increasing redness, flashes, floaters, or a curtain-like shadow in your vision after treatment.