Spectral domain optical coherence tomography in type 2 idiopathic perifoveal telangiectasia.

BACKGROUND AND OBJECTIVE To compare images acquired by Stratus time domain optical coherence tomography (OCT) (Carl Zeiss Meditec, Dublin, CA) and Cirrus spectral domain OCT (Carl Zeiss Meditec) in cases of bilateral type 2 idiopathic perifoveal telangiectasia. PATIENTS AND METHODS Twenty-three eyes of 12 patients with type 2 idiopathic perifoveal telangiectasia were examined on the same day with both OCT systems. RESULTS Foveal cystoid spaces were detected in more eyes by Cirrus than Stratus OCT (19 of 23 vs 13 of 23). Disruptions of the inner segment/outer segment photoreceptor line were detected with both systems but were only quantified on Cirrus images. Thinning of central foveal thickness was established by both, but only Cirrus OCT measured outer retinal thinning on the temporal compared to the nasal side of the fovea. CONCLUSIONS Spectral domain OCT could become a new noninvasive tool for facilitating early diagnosis of type 2 idiopathic perifoveal telangiectasia and for following its evolution and the effects of any treatments.