Recovery of macular cone photoreceptors in Vogt-Koyanagi-Harada disease
Our purpose was to study changes in macular cone photoreceptors in Vogt-Koyanagi-Harada (VKH) disease patients after high-dose corticosteroid treatment using an adaptive optics (AO) fundus camera.
We retrospectively analyzed 16 eyes of eight patients with new-onset acute VKH disease that were studied retrospectively. After serous retinal detachment (SRD) had resolved, AO images were obtained using the rtx1™ AO fundus camera over a 12-month course. Cone counting was performed in the nasal, temporal, superior and inferior areas of the macula 0.75 mm from the foveal center. A control group of 30 eyes of 30 healthy subjects was established for comparison.
In the eyes with VKH disease, the mean cone densities 0.75 mm from the foveal center were 11,847 at baseline (resolution of SRD), and 15,218, 16,684 and 17,686 cones/mm2, at 3, 6, and 12 months later, respectively. The mean cone densities at 3, 6, and 12 months were significantly increased compared to those of baseline (p = 0.007, p < 0.001, and p < 0.001, respectively); however, they were significantly lower than that of the healthy control eyes (p < 0.001). The mean cone densities at areas with a previous presence of cystoid spaces were significantly lower than those without cystoid spaces at the baseline, and at 3, 6, and 12 months (p < 0.001, p = 0.007, p < 0.001, and p = 0.008, respectively).
Cone densities were gradually increased after the resolution of SRD in the eyes of VKH disease patients. The presence of cystoid spaces might be a marker of severe damage to cone photoreceptors.
KeywordsAdaptive optics Cone density Cystoid space Photoreceptor Serous retinal detachment Vogt-Koyanagi-Harada disease
Compliance with ethical standards
Conflicts of interest
All authors have no financial interest in the subject matter or materials disucussed in this manuscript.
All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and the national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
For this type of study, formal consent is not required.
Informed consent was obtained from all individual participants included in the study.
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