Retinal Photodynamic Therapy (PDT)


Retinal diseases may occur for a variety of reasons. In this case, a timely visit to an ophthalmologist and doing initial retinal examinations are necessary for the treatment of the retinal diseases and prevent further damage.

Typically, retinal diseases can be controlled in case of timely treatment. The retina is a light-sensitive layer of cells in the back of the eye that converts light into electrical signals, then these signals are sent to the brain. The macula, the sensitive central part of the retina, may be involved with various diseases such as CSR, in which fluid accumulates under the retina and affects the central vision, or AMD, which is related to age-related retinal lesions. Retinal Photodynamic Therapy (PDT) is a method for treating these types of retinal diseases. Photodynamic therapy uses lasers and a special medicine that works when exposed to a type of light. Recently, Motahari Noor Subspecialty Eye Clinic utilizes this highly advanced device to treat retinal diseases.

Treatment Method

Just before the procedure, your ophthalmologist injects a medicine into a vein in your arm. This medicine is sensitive to light. It collects in the lesions of your eye (the abnormal blood vessels under your macula). You are then given an anesthetic eye drop. Using a special contact lens, your ophthalmologist then shines a laser into your eye.

A specific wavelength of the laser light activates the medicine in the affected areas, which are detected using retinal imaging. The medicine then creates blood clots in your abnormal blood vessels. This seals off the vessels. This can help prevent more vision loss.

Common Complications

• Blurred vision

• Back pain related to injection of the medicine

• Sensitivity to sunlight

• Temporary loss of visual sharpness which is transient.

The complications may differ according to your age and type of your underlying illness. The success rate of retinal photodynamic therapy (PDT) varies depending on the type of retinal disease and in many cases, it just causes to prevent more vision loss and keep your remaining vision and sometimes it improves your vision too.

Post-Operative Care

For a few days after the procedure, your eyes and skin will be more sensitive to light. This is due to the light-sensitive medicine. So be sure to protect your eyes and skin from sun exposure for up to 5 days. During this time, if you must go outside, use dark glasses and protective clothing (long sleeves and caps). It should be noted that in this case, sunscreens are not effective in preventing sun exposure.

Is retinal photodynamic therapy (PDT) a kind of permanent treatment?

Retinal photodynamic therapy (PDT) cannot prevent the progression of the disease in all cases, and there is a risk of re-activation of the abnormal vessels, and recurring the treatment may be necessary.

Retinal Detachment Brochure