Argon Laser Photocoagulation

What is argon laser photocoagulation

Argon laser photocoagulation uses a focused beam of light to create controlled thermal spots on the retina. The aim is to limit leakage from vessels, reduce neovascularisation, or reinforce the stability of areas with tears or other vulnerability, always according to the clinical picture and international practice.

Panretinal photocoagulation (PRP) is used in selected stages of diabetic retinopathy to reduce the ischaemia that leads to neovascularisation; focal photocoagulation targets specific lesions. The ophthalmologist explains which type suits your case and what to expect over time.

The method is one of the established techniques for managing retina and macula diseases. It does not automatically replace other treatments (e.g. intravitreal anti-VEGF injections for oedema or neovascularisation), but is combined with or alternated with them when the plan requires. For an objective picture, OCT / OCTA, digital fundus photography and, where indicated, fluorescein angiography are often used.

Indications in clinical practice

In diabetic retinopathy, photocoagulation may be used as panretinal (PRP) or focal treatment, depending on the stage, the presence of neovascularisation or oedema, and the response to other treatments. Control of blood sugar, blood pressure and lipids remains essential; laser supplements the plan when the indications are clear.

In vascular occlusions (e.g. branch or central vein occlusion), the strategy is individualised. Imaging helps determine when and where laser is applied, so treatment of oedema or ischaemia is not delayed when other options come first.

For tears, holes or other vulnerable areas of the peripheral retina, therapeutic photocoagulation aims to reduce the risk of detachment or extension of the lesion. The decision is made after a full examination, often as part of a comprehensive check-up or specialised assessment. Regular screening in diabetic patients reduces the likelihood of reaching an advanced stage before PRP is discussed.

How the application is performed at the practice

The procedure is carried out at the practice. Local anaesthesia (eye drops) is usually used, together with a special contact lens for stable focusing of the beam. The patient is awake and cooperates with brief instructions; the duration depends on the extent of treatment, and sometimes several sessions are needed to complete the plan safely.

During the procedure you may notice flashes of light — this is expected. No hospital stay is required; after the procedure, written instructions are given for protection, drops where needed, and a follow-up schedule. If vision is blurred, avoid driving the same day and arrange a companion instead.

• Pressure and findings checked before/after where indicated
• Temporary light sensitivity or mild discomfort — report severe pain
• A companion for the journey home if vision is blurred after the procedure

The number of sessions or completion of a laser plan is determined clinically. Monitoring is often linked to regular examination and repeat imaging, so it can be seen whether the condition is stabilising or needs the treatment adjusted.

Combination with injections and other options

In many situations (e.g. diabetic macular oedema, wet age-related macular degeneration in selected scenarios, vascular occlusions with oedema), the first step may be intravitreal anti-VEGF injections, with laser added when the indications and evidence support it. The sequence and timing are determined based on OCT, fundus photography and the clinical picture, not by a general rule for everyone.

Individualisation is central: the same finding in two patients does not always mean the same treatment plan. The risk–benefit discussion takes place personally after examination. For a broader picture of retinal conditions and related tests, see the retina and macula diseases section.

After photocoagulation and appointments

After the application there may be temporary blurring, light sensitivity or mild discomfort; follow the instructions for drops and protection from bright light. Most patients return to daily activities within a few days, following the practice's individual instructions. Severe pain, sudden vision loss, a "curtain" sensation in the field, or significant redness require immediate contact with your ophthalmologist.

Near-vision tasks may be temporarily affected; avoid hazardous activities while you feel unsteady. For general preventive eye examination, see eye check-up; for an overview of services, services; for appointments, contact.