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Laser treatment for retinal disease using a concentrated beam of light to target diseased areas within the retina. Types include focal laser treatment, also known as photocoagulation, to stop or slow leakage from abnormal or damaged blood vessels, and scatter laser treatment, also known as panretinal photocoagulation, to treat abnormal blood vessels away from the macula. The treatment may be used for diabetic retinopathy, retinal vein occlusions, age-related macular changes, retinal breaks or detachment, and ocular tumours. No specific preparation is required, but bring glasses or contact lenses with lens solution and sunglasses. Arrange transport home because driving is not possible immediately after treatment due to temporary light sensitivity. Eye drops numb the eye and dilate the pupils. The procedure is usually painless, performed while seated and awake, and most patients can return to work the next day. Sunglasses may be needed for a few hours after treatment.