Photodynamic therapy (PDT) for eyes: what to know

PDT applies a photosensitising medicine to a target area, then activates it with a prescribed light. It is not the same as a cosmetic eye brightening treatment. Around the eyes, the clinician must protect the eyeball and decide whether the target is eyelid skin, nearby skin, or a separate eye condition. Treatment may be considered for selected lesions, including some forms of basal cell carcinoma, but suitability depends on the diagnosis, depth, location, and available alternatives.

The medicine can leave treated skin unusually light-sensitive for a period after treatment. Bright indoor light and daylight may trigger discomfort or skin injury during that window, so the treating team should explain exactly how to shield the skin and when normal exposure can resume.

Before treatment, tell the clinician about eye disease, medicines that increase light sensitivity, previous reactions to PDT, and any infection or open skin near the site. Arrange the recommended eye protection and follow the clinic’s written light-avoidance plan. Do not improvise with household lamps or apply products near the eyes unless the team approves them. Keep follow-up appointments so the response can be checked and the diagnosis reconsidered if healing is delayed.

Contact the treating service promptly for worsening eye pain, marked swelling, new blurred or reduced vision, light sensitivity that is severe, pus, spreading redness, or a fever. Urgent assessment is appropriate for sudden vision change or an eye injury. These symptoms need examination rather than being assumed to be a normal treatment reaction.

What exact area will be treated, and how will my eye be protected? Which medicine and light will be used? How long must I avoid bright light? What should I do if the eyelid swells or my vision changes? Is another treatment, such as topical 5-fluorouracil, more suitable for my diagnosis?