Abstract
Purpose. Development of a photocolorimetric scale to assess the extent of trabecula pigmentation along its circumference in patients with primary open-angle glaucoma. Material and methods.Study of 36 patients (62 eyes) with primary open-angle glaucoma was performed. Average age: 61.5 ± 9.8 years (48–75 years). Men – 24 (40 eyes), women – 12 (22 eyes). All patients underwent a comprehensive ophthalmic examination, as well as photoregistration of the iridocorneal angle. Using the Pixelmator Pro (Pixelmator Team, USA) and the photographic images, we performed colorimetric estimation of the degree of the iridocorneal angle pigmentation. RGB (Red, Green, Blue) values for weak, moderate, pronounced, and sharply pronounced trabecular pigmentation were determined. Using color model HSL (Hue, Saturation, Lightness) derived percentages (range) corresponding to a certain degree of trabecular pigmentation. Results.Basing on the results, a colorimetric scale was developed for quantifying the trabecular pigmentation degree in patients with primary open-angle glaucoma. The results obtained by us will serve in the future for more accurate objectification of the definition of pigmentation degree, which is certainly of practical importance in the clinical practice of ophthalmologists. Conclusion. The application of HSL-color models allows to estimate with high reliability the differences between levels of trabecular pigmentation in patients with glaucoma. Using a photocolorimetric scale allows to estimate objectively the efficacy of laser operations aimed at reducing the degree of trabecular pigmentation of the iridocorneal angle. Keywords: primary open-angle glaucoma, gonioscopy, photocolorimetric assessment of the pigmentation degree, colorimetric scale
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