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Lasers

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Lasers

Lasers are used in a multitude of conditions for the retina. Retinal photocoagulation is the mechanism of action. In this phenomenon, light energy is converted to hear at the level of the retina, leading to protein denaturation.

Indications

  • Proliferative Diabetic Retinopathy
  • Diabetic Macular Edema
  • Vascular Occlusion
  • Central Serous Chorioretinopathy
  • Retinal Breaks
  • Retinal Detachment

Mechanism of Action

  • A direct action on the vessels
  • Closure and reduced leakage
  • Scarring + Burns of the layers of the retina
  • Reduced oxygen demands
  • Increased oxygenation of the inner retina
  • Photocoagulation
  • Retinal cell activation
  • Cytokine production
  • Reduction of vascular growth factor + Edema

Types of Lasers

  • Green (Argon) laser
  • Yellow laser:
    Sealing the leaky blood vessels
  • Photodynamic laser:
    Using a drug (Visudyne) + Red laser. This is used to seal abnormal and leaking retinal vessels.
  • Yag Laser:
    This type of laser is used to create a opening of the membrane that is frequently formed on the implanted intraocular lens.
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