Retinal Laser Surgery

Laser photocoagulation creates controlled treatment spots in selected areas of the retina. Laser energy produces a localized thermal reaction. In the peripheral retina, this helps form chorioretinal adhesion around an area at risk.

The goal depends on the diagnosis: creating a barrier around a tear, reducing the stimulus for abnormal vessel growth, or treating a localized area of disease.

When is laser photocoagulation used?

• For a symptomatic retinal tear, laser treatment may reduce the risk of retinal detachment developing or extending.
• For proliferative diabetic retinopathy, panretinal photocoagulation (PRP) remains an important treatment. A wider peripheral area is treated to reduce the ischemic stimulus for neovascularization. The plan may also include anti-VEGF therapy.
• For diabetic macular edema or edema following retinal vein occlusion, laser is not a universal first-line treatment. Anti-VEGF therapy often takes priority, while focal or grid laser is considered in selected cases according to edema location, macular condition, and response to other treatment.
• For selected peripheral retinal degenerations, preventive treatment is considered according to the specific findings and clinical risk.

When does laser not replace other treatments?

Laser is not a universal way to “strengthen the retina.” Not every area of thinning, case of high myopia, or pregnancy requires photocoagulation.

For significant retinal detachment, outpatient laser photocoagulation usually does not replace vitreoretinal surgery.

Laser may also be applied inside the eye during surgery as endolaser treatment. This is a different clinical setting from outpatient photocoagulation.

How is the treatment pathway determined?

The decision follows a fundus examination and any necessary diagnostic tests. Careful peripheral retinal examination is important; vascular disease also requires assessment of the macula, ischemia, and disease activity.

• Sudden flashes and new floaters: urgent examination is needed to exclude a tear or detachment. A high-risk tear may require barrier laser treatment, while detachment may require surgery.
• Diabetes with neovascularization: retinopathy stage, macular edema, and ischemia are assessed. PRP, anti-VEGF therapy, or a combined strategy is selected when indicated.
• Macular edema: macular OCT, identification of the cause, and visual function assessment guide treatment.
• High myopia without symptoms: peripheral retinal findings determine whether monitoring or prophylactic peripheral laser treatment is appropriate for a clinically significant risk.
• Pregnancy with myopia: decisions depend on the actual retinal condition. Laser is performed only when indicated. The obstetric team determines the delivery method, taking the ophthalmic assessment into account.

What does the procedure involve?

The clinician applies laser spots according to the selected pattern. The number of pulses and treatment area depend on the diagnosis.

Afterward, the eye is assessed, instructions are provided, and follow-up is arranged. Panretinal treatment often requires several sessions.

Why is continued follow-up important?

Laser spots create a local barrier but do not prevent new tears elsewhere in the retina.

Recurrent flashes, a new curtain-like shadow, or a sudden increase in floaters require urgent reassessment, even if previous treatment was successful.

In diabetic retinopathy, treatment often forms part of long-term monitoring. Managing blood glucose, blood pressure, and other systemic factors affects progression risk but does not replace ophthalmic treatment.

PRP, anti-VEGF therapy, and surgery serve different purposes. The treatment plan may change as the retinal condition changes.