Photodynamic Therapy (PDT)

What is photodynamic therapy (PDT)?

Photodynamic therapy is a treatment in which a special light-activated medicine is used to seal abnormal blood vessels in the eye.

What is the benefit of photodynamic therapy (PDT)?

Photodynamic therapy can be used to selectively target the abnormal tissue with minimal effect on the surrounding intricate structures within the eye.

Which eye conditions may be treated with photodynamic therapy (PDT)?

Eye conditions that may be treated with photodynamic therapy include:

  • Wet macular degeneration
  • Central serous chorioretinopathy
  • Ocular histoplasmosis syndrome
  • Myopic degeneration

How is photodynamic therapy (PDT) performed?

The procedure can be done in the office setting. The light-sensitive medicine is injected into a vein in your arm and eye drops are administered. The medicine collects in the areas with abnormal blood vessels within the eye. A special contact lens will be placed on your eye and a cold laser directed at the area of concern in the eye for a short period of time (approximately 90 seconds). The focussed light from the laser activates the medication in the eye which destroys the abnormal tissue.

How do you prepare for photodynamic therapy (PDT)?

You should arrange for transportation back home after the procedure as your eyes will be temporarily sensitive to light and you will not be able to drive. You should also bring sunglasses, long-sleeved clothes and a wide-brimmed hat.

What precautions should be taken after photodynamic therapy (PDT)?

Specific instructions will be provided by your doctor. Care should be taken to avoid direct sun exposure for a few days after the procedure.

What are the side effects associated with photodynamic therapy (PDT)?

You may experience temporary blurriness and change in vision immediately after the procedure; however, these side effects should resolve in a short amount of time.