Having Photodynamic Therapy for Age-Related Macular Degeneration (AMD)
Photodynamic therapy is a treatment for the eyes. It uses lasers and a special medicine that works when exposed to a type of light. It is done to treat age-related macular degeneration (AMD). AMD is a condition that can lead to loss of eyesight. Photodynamic therapy uses a light-sensitive medicine and a laser to seal off abnormal blood vessels in your eye. It can’t restore eyesight that you have already lost. But it may slow down the damage to your central vision.
What to tell your healthcare provider
Tell your healthcare provider about all the medicines you take. This includes over-the-counter medicines such as ibuprofen. It also includes vitamins, herbs, and other supplements. And tell your healthcare provider if you:
Have had any recent changes in your health, such as an infection or fever
Are sensitive or allergic to any medicines, latex, tape, or anesthesia (local and general)
Are pregnant or think you may be pregnant
Tests before your procedure
You may need some exams before your procedure. Your doctor may use special tools to shine a light in your eye and look at the back of your eye. You may need to have your eyes dilated for this eye exam. You may have imaging tests such as:
Fluorescein dye retinal angiography, which uses a special dye and camera to look at the blood flow of the retina and choroid
Optical coherence tomography, which uses light waves to take images of the retina
Fundus autofluorescence, which uses fluorescent pigments make images of the retina
Getting ready for your procedure
Talk with your healthcare provider how to get ready for your procedure. You may need to stop taking some medicines before the procedure, such as blood thinners and aspirin. If you smoke, you may need to stop before your procedure. Smoking can delay healing. Talk with your healthcare provider if you need help to stop smoking.
Also, make sure to:
Ask a family member or friend to take you home from the hospital. You cannot drive yourself.
Not eat or drink after midnight the night before your procedure
Follow all other instructions from your healthcare provider
You will be asked to sign a consent form that gives your permission to do the procedure. Read the form carefully. Ask questions if something is not clear.
On the day of your procedure
It is most often done as an outpatient surgery in a doctor’s office or eye clinic. During a typical surgery:
You will likely be awake during the surgery. You may be given a medicine to help you relax. The doctor will use anesthetic eye drops to make sure you don’t feel anything.
A healthcare provider will give you an injection of the light-sensitive medicine.
The doctor will use eye drops to dilate your pupil. It will stay dilated for several hours after the procedure. The doctor will put a special type of contact lens into the affected eye. This lens helps focus a beam of laser light on the retina using a tool called a slit lamp.
The doctor will shine a laser in the exact spot in your eye. This will activate the light-sensitive medicine. It will form blood clots in the abnormal vessels below your macula. This seals off the abnormal blood vessels.
Your eye may be covered with a bandage or patch.
After your procedure
Ask your doctor about what you should expect after your surgery. You should be able to go home the same day. Plan to have someone go home with you after the surgery.
Recovering at home
Be sure to follow your doctor’s instructions about eye care and medicines. Your eye may be a little sore after the surgery, but you should be able to take over-the-counter pain medicines.
Your vision may be blurry for a short while after the surgery, but this often goes away. For a few days after the procedure, your eyes and skin will be more sensitive to light. This is because of the light-sensitive medicine in your body. During this time, you will need to stay indoors and away from direct sunlight. If you must go outside, use dark glasses and wear protective clothing. Ask your eye doctor when it is safe for you go outside again.
You will need close follow-up care with your doctor. He or she will check you for problems and manage your treatment for AMD.
When to call your healthcare provider
Call your healthcare provider right away if you have any of these:
Fever of 100.4°F (38.0°C) or higher
Eye redness or swelling that gets worse
Eye pain that doesn’t get better, or gets worse
March 21, 2017
Arroyo JG. Age-related macular degeneration: clinical presentation, etiology, and diagnosis. UpToDate., Arroyo JG. Age-related macular degeneration: treatment and prevention. UpToDate.
MMI board-certified, academically affiliated clinician,Turley, Ray, BSN, MSN