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Purpose . To evaluate the relationship between internal carotid artery (ICA) stenosis and subfoveal choroidal thickness (SFCT) in the elderly population.  Methods . A total of 42 eyes of 21 patients with more than 70% ICA stenosis (Group 1) on one side and less than 70% stenosis (Group 2) on the other side were recruited for this study. ICA stenosis was diagnosed using both the B-mode and Doppler ultrasound. The two groups were compared in terms of the percentage of stenosis, SFCT measurements, intraocular pressure, ocular perfusion pressure, refractive error, and peak systolic velocity. Eyes were examined with the RTVue-100 OCT device by the EDI-OCT technique.  Results . The mean age of the patients was 71.9 ± 10.8 years. The mean percentage of ICA stenosis was 74 ± 4.9% in Group 1 and 47.5 ± 7.7% in Group 2. The mean SFCT was 231.9 ± 44.6  μ m in Group 1 and 216.2 ± 46.8  μ m in Group 2, which was significantly lower ( P  = 0.028). A statistically significant positive correlation was found between the percentage of internal carotid artery stenosis and SFCT ( r  = 0896,  P  = 0.001).  Conclusions . Compensatory SFCT increase can be seen in ipsilateral internal carotid artery stenosis greater than 70%.

Evaluation of Subfoveal Choroidal Thickness in Internal Carotid Artery Stenosis