Abstract
This study aimed to describe the optical and topographic changes after manual superficial keratectomy (MSK) for Salzmann nodular degeneration. This was a descriptive, retrospective study. All patients with a clinical diagnosis of Salzmann nodular degeneration were examined at the Cornea Service of the Instituto Clínico Quirúrgico de Oftalmología (ICQO), Bilbao, Spain, and treated with MSK after presenting ocular discomfort and/or decreased visual acuity. The clinical characteristics (including anterior segment optical coherence tomography and Pentacam topography), treatment regimens, surgical procedures, and outcomes were recorded. Descriptive statistics were constructed using mean ± SD, minimum, maximum, and median. The Shapiro-Wilk normality test was used. The Student t test was used to determine significance. Ten eyes of 9 patients were included in this study: 6 patients (66.6%) were female and 3 were male (33.3%). The mean age was 62.2 years, and the follow-up time was between 5 and 21 months. The best-corrected visual acuity before MSK was 0.20 LogMAR (median) and improved to 0.10 after the surgical procedure. The mean spherical equivalent was reduced from -0.23 ± 3.39 D preoperatively to -1.3 ± 3.0 D postoperatively. Astigmatism decreased between 0.5 and 3.75 D. Topographic irregularity normalized total root mean square from 11,596.4 ± 6854.01 to 4817.2 ± 2725.68 μm. MSK is an effective and safe technique for the treatment of Salzmann nodular degeneration when the Bowman layer is preserved. Anterior segment optical coherence tomography and corneal topography are essential tools for the surgical plan and for the detection of corneal aberrations.
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