Retinal Laser Treatment for Your Eyes
Understanding Retinal Laser Treatment
Retinal laser photocoagulation is a procedure that uses laser-generated heat to create tiny, controlled burns on the retina. These burns form small scars that serve a specific purpose. Depending on the condition being treated, the scars may seal a retinal tear, destroy abnormal blood vessels, or reduce fluid leakage in the retina.
The procedure is performed in a retina specialist's office, not in an operating room. It has been a cornerstone of retinal care for decades.
During treatment, laser light passes through the eye. It is absorbed primarily by the retinal pigment epithelium (the layer of cells beneath the retina) and the choroid (the blood vessel layer behind the retina). This absorption generates heat. The heat creates a tiny area of controlled tissue change that develops into a scar over time.
Short laser pulses affect a narrow zone of tissue. Longer pulses allow heat to spread through the full thickness of the retina. Your retina specialist selects the pulse duration and intensity based on the specific condition and area being treated.
Retinal laser treatment is used for a range of conditions. The most common include:
- Retinal tears and holes
- Proliferative diabetic retinopathy (advanced diabetic eye disease with abnormal blood vessel growth)
- Diabetic macular edema (swelling in the central retina from diabetes)
- Branch and central retinal vein occlusion (blocked veins in the retina)
- Central serous chorioretinopathy (fluid buildup under the retina)
- Retinal and choroidal tumors
- Lattice degeneration (thinning areas in the peripheral retina)
Who May Need Retinal Laser and Risk Factors
Diabetic retinopathy is one of the most common reasons for retinal laser treatment. In 2021, an estimated 9.60 million people in the United States had diabetic retinopathy, representing about 26.43 percent of those living with diabetes (PMC, 2023). Both the duration of diabetes and blood sugar control influence the risk of developing vision-threatening disease.
When diabetic retinopathy progresses to the proliferative stage, abnormal blood vessels grow on the surface of the retina. These fragile vessels can bleed or cause scarring that pulls on the retina. Laser treatment remains the standard approach for managing this stage of the disease.
Retinal tears, holes, and lattice degeneration occur in nearly 10 percent of the general population. They are more common among people who are nearsighted (AAO, 2024). Retinal tears can develop when the vitreous gel (the clear gel filling the eye) separates from the retina during normal aging. People with abnormal thinning in the peripheral retina or those who have experienced eye trauma are also at higher risk.
Treating a retinal tear with laser early can prevent it from progressing to a retinal detachment. Retinal detachment is a much more serious condition requiring surgery.
Retinal vein occlusions, which involve blocked blood flow in the retinal veins, may require laser treatment. Laser can address complications like abnormal vessel growth or persistent swelling. Central serous chorioretinopathy, a condition that causes fluid to collect under the macula, may also be treated with laser in certain cases.
Retinal and choroidal tumors can sometimes be managed with laser photocoagulation. This depends on the size, type, and location of the tumor. Your retina specialist will determine whether laser is appropriate based on the specifics of your condition.
Signs and Symptoms That May Lead to Laser Treatment
Retinal tears can develop suddenly. Warning signs include a sudden onset of black spots or floaters in the affected eye. Some people describe this as the appearance of someone shaking pepper into their field of vision. Flashes of light, especially in the side of your vision, are another common symptom.
If a retinal tear leads to bleeding inside the eye or a retinal detachment, you may notice blurred vision. A shadow that looks like a curtain closing in from the side may also appear. This shadow may stay in one area or progress toward the center of your vision. See a retina specialist or go to the emergency room immediately if you experience any of these symptoms.
In its early stages, diabetic retinopathy often causes no symptoms at all. As the disease advances, you may notice blurry or fluctuating vision, dark spots, difficulty seeing colors, or areas of vision loss. These changes happen gradually in many cases. This is why regular eye exams are critical for people with diabetes.
By the time symptoms are noticeable, the disease may have already reached an advanced stage. Early detection through routine screening gives your retina specialist the best chance to preserve your vision.
Macular edema, or swelling of the central retina, can cause blurred central vision, distorted vision, or difficulty reading. This swelling may result from diabetes, retinal vein occlusion, or other conditions. Your retina specialist may recommend laser treatment if swelling does not respond well to other therapies.
Diagnosis and Testing Before Laser Treatment
Before recommending laser treatment, a retina specialist performs a thorough dilated eye exam. Special drops widen your pupils so the specialist can view the retina in detail. A magnifying lens and a bright light are used during this examination. This helps identify tears, abnormal blood vessels, fluid leakage, or other problems.
Your retina specialist may also order imaging tests to gather more information. Optical coherence tomography (OCT) produces detailed cross-section images of the retina, showing fluid buildup or swelling. Fluorescein angiography involves injecting a dye into a vein in your arm. Photographs are taken as the dye travels through the blood vessels of the retina. This test reveals leaking or blocked vessels.
These tests help the specialist determine the exact location and extent of the problem. They also allow precise planning for the laser treatment.
Not every retinal condition requires laser treatment. Your retina specialist considers the type and severity of your condition, the location of the problem, and other treatment options. In some cases, laser is used alongside intravitreal injections. In other cases, laser alone may be sufficient.
Types of Retinal Laser Treatment
Focal laser treatment targets a specific, small area. For retinal tears, the laser creates a ring of small burns around the tear. These burns form scars that seal the tear and hold the retina in place. This reduces the risk of retinal detachment. For macular edema, focal laser is directed at specific points of leakage to reduce fluid buildup.
Grid laser treatment is a variation of focal laser used for broader areas of swelling. It applies a pattern of laser spots over the affected zone to help reduce edema. Grid laser may be offered if macular edema does not respond well to injection therapy.
Panretinal photocoagulation (PRP), also called scatter laser surgery, treats the peripheral retina with hundreds to thousands of laser spots. This reduces the oxygen demand of the outer retina. It helps shrink or prevent the growth of abnormal blood vessels in proliferative diabetic retinopathy.
The Diabetic Retinopathy Study demonstrated that PRP reduced severe vision loss by 50 percent. At two years, only 11 percent of treated eyes with high-risk retinopathy developed severe visual loss, compared to 26 percent of untreated eyes (EyeWiki, AAO). PRP remains a proven treatment for advanced diabetic eye disease.
Several advances have improved how retinal laser is delivered. PASCAL (Pattern Scan Laser) uses short pulses and semi-automated patterns to deliver multiple laser spots quickly. This can reduce treatment time and discomfort for patients undergoing PRP or other extensive treatments.
Micropulse laser delivery breaks each treatment into repeated microsecond bursts with cooling intervals between them. This approach treats the retina without causing the visible burns associated with conventional laser. It potentially reduces side effects while still providing benefit.
The Navilas 577s navigated laser system is FDA-cleared for treating diabetic macular edema, retinal vein occlusions, and retinal tears, among other conditions. It uses infrared illumination instead of bright visible light, which may be more comfortable. It is the only retinal laser that can perform focal treatments without a contact lens on the eye.
What to Expect During and After Treatment
Retinal laser treatment is performed in the office of a retina specialist. You will sit at a device similar to the one used for routine eye exams. Your specialist will place numbing drops in your eye. For some types of laser, a special contact lens may be placed on the eye to focus the laser beam. The lens is removed after the procedure.
You will see bright flashes of light during the treatment. Some patients feel a mild stinging or aching sensation, particularly during PRP. Focal laser for a retinal tear is usually brief, often taking just a few minutes. PRP for diabetic retinopathy takes longer and may be performed in one or more sessions.
The laser itself is not a cutting tool. It works by creating tiny, precise areas of thermal energy on the retina. You remain awake throughout the procedure.
Your vision may be blurry for several hours after treatment. Your eyes may also be sensitive to light. Most people can return to normal activities the same day or the next day. Your retina specialist will schedule follow-up visits to monitor healing and determine whether additional treatment is needed.
Some patients notice small dark spots in their peripheral vision after PRP. These correspond to the areas treated by the laser. Over time, most people adjust to these changes. Your specialist will discuss what to expect based on the specific type of laser treatment you receive.
For conditions like diabetic macular edema and retinal vein occlusion, retina specialists often start treatment with intravitreal anti-VEGF injections. These medications include Eylea (aflibercept), Lucentis (ranibizumab), Avastin (bevacizumab, used off-label for eye conditions), and Vabysmo (faricimab). They block the growth of abnormal blood vessels and reduce fluid leakage.
If macular edema does not respond sufficiently to injections, laser treatment may be added. In proliferative diabetic retinopathy, laser and anti-VEGF therapy may be used together. Your retina specialist will create a treatment plan based on how your condition responds over time.
Living With Your Condition After Laser Treatment
Retinal laser treatment is highly effective at stabilizing vision and preventing further damage. However, it does not reverse vision loss that has already occurred. Regular follow-up appointments are essential. Your retina specialist will use imaging and examination to track your retina and adjust treatment if needed.
For people with diabetes, ongoing management of blood sugar, blood pressure, and cholesterol remains critical. Good systemic health helps protect the retina and supports the lasting benefit of laser treatment.
After laser treatment for a retinal tear, the risk of retinal detachment in that area is greatly reduced. However, new tears can develop elsewhere. Report any new floaters, flashes, or changes in your vision to your retina specialist promptly.
For patients with diabetic retinopathy, laser treatment can slow or stop disease progression. It does not eliminate the underlying cause. Continued diabetes management and regular retinal exams are the best strategies for long-term vision preservation.
When to See a Retina Specialist
Certain symptoms demand urgent evaluation. See a retina specialist or go to the emergency room immediately if you experience any of the following:
- A sudden increase in floaters
- Flashes of light in your vision
- A curtain or shadow over part of your vision
- Sudden vision loss in one eye
People with diabetes should have a comprehensive dilated eye exam at least once a year, even if they have no symptoms. People who are nearsighted or who have a family history of retinal detachment should also discuss regular retinal screening with their eye care provider. Early detection of retinal problems provides the best opportunity for effective treatment.
Questions and Answers
Most patients experience little to no pain during focal laser treatment for retinal tears. Numbing drops are applied before the procedure. During panretinal photocoagulation for diabetic retinopathy, some patients feel a mild aching or stinging sensation. This occurs because more of the retina is being treated. If discomfort occurs, your retina specialist can adjust the laser settings or pause the treatment.
Focal laser for a retinal tear typically takes only a few minutes. Panretinal photocoagulation for diabetic retinopathy may take 15 to 30 minutes per session. It may require more than one session to complete. The total treatment time depends on the condition being treated and the area of retina involved.
Retinal laser treatment is designed to preserve your current vision and prevent further loss. It does not restore vision that has already been damaged by conditions like diabetic retinopathy or retinal detachment. This is one reason early detection and timely treatment are so important. The goal is to stabilize the retina before significant vision loss occurs.
This depends on your specific condition. Some retinal tears require only a single laser session. Diabetic retinopathy or macular edema may require additional laser sessions, ongoing anti-VEGF injections, or both. Your retina specialist will monitor your retina at follow-up visits. Additional treatment will be recommended if the condition progresses or does not respond as expected.
Retinal laser treatment is considered safe and well-established, but like any procedure, it carries some risks. Possible side effects include temporary blurry vision, mild discomfort, sensitivity to light, and small blind spots in the peripheral vision after extensive treatment such as PRP. Rarely, complications can include accidental laser to the center of the retina or worsening of macular edema. Your retina specialist will discuss the specific risks that apply to your situation before proceeding.