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Graded subthreshold transpupillary thermotherapy for chronic central serous chorioretinopathy
George J Manayath1, Venkatapathy Narendran, Saurabh Arora
1Department of Retina and Ocular Oncology, Aravind Eye Hospital, Avinashi Road, Coimbatore, Tamil Nadu, India. gjmanayath@yahoo.com
Background And Objective:
To study the safety and efficacy of "graded" subthreshold transpupillary thermotherapy (TTT), a novel treatment protocol for chronic central serous chorioretinopathy (CSC) and an alternative to photodynamic therapy (PDT).
Patients And Methods:
This retrospective pilot study included 10 eyes with chronic CSC that underwent TTT with 810-nm continuous diode laser treatment using a subthreshold power (60% reduced from threshold) for 60 seconds. Treatment was repeated at 20% increase in power from the baseline if submacular fluid persisted on optical coherence tomography (OCT) after 1 month (graded fashion).
Results:
The mean chronic CSC duration was 20.3 ± 8.3 months. Eight eyes (80%) showed resolution of CSC on OCT. Mean number of TTT sittings required was 1.5. Although 5 eyes (50%) had 3 or more lines of improvement in Snellen visual acuity, 3 eyes (30%) had up to 2 lines of improvement. None of the patients developed macular burn or scar.
Conclusion:
The safety enhanced graded subthreshold TTT was beneficial in patients with chronic CSC.
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