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One-year outcomes after photodynamic therapy in patients with age-related macular degeneration with poor baseline
Michael J Potter1, Shelagh M Szabo
1Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia, Canada. mpotter@interchange.ubc.ca
Background:
Photodynamic therapy with verteporfin (PDT) has been demonstrated in randomized controlled trials to be a safe and effective therapy for choroidal neovascular membranes (CNV) secondary to age-related macular degeneration (AMD). Limited information is available on the prognosis with PDT for patients who fell outside the inclusion criteria for the clinical trials, however. The purpose of this study is to describe the clinical course of patients with CNV lesions in AMD treated with PDT, with baseline visual acuities sufficiently poor to warrant exclusion from previous randomized trials.
Methods:
Retrospective case series. Ten consecutive patients with CNV secondary to exudative AMD treated with PDT with baseline visual acuity less than 34 ETDRS letters were followed for 1 year. The main outcome was median change in visual acuity on the ETDRS chart.
Results:
The median change in acuity over 12 months was + 13 letters. All patients lost <3 lines of ETDRS acuity, and eight of ten patients (80%) gained at least one line of vision, over 12 months.
Conclusions:
In our series, patients with low visual acuity at baseline appeared to respond to PDT on both visual acuity and fluorescein angiographic measurements. PDT treatment may be considered for selected patients with these baseline characteristics.
