The Laser treatment constituted a paradigm change in Ophthalmology, allowing a therapeutic applicability in various structures of the eye and allowing an excellent solution in various ocular pathologies. Its use allows a treatment almost painless and without risk of relevant infection, and can be used on an outpatient basis.

Laser is considered a fundamental "therapeutic weapon" in the treatment of Diabetic Retinopathy and is also particularly useful in other vascular pathologies of the retina, such as retinal tears, as in some forms of Glaucoma, Refractive Surgery and Oculoplastic Surgery.

The Portuguese Institute of Retina has several types of laser: subliminal laser of micro-pulsed diode, conventional Argon Laser and Nd-YAG Laser. The ophthalmologists of the Portuguese Institute of Retina have at their disposal several equipment of great precision, with systems of focalization, that allow a total control of the procedure.