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    Changes in corneal wavefront aberrations and anterior segment parameters after horizontal rectus muscle surgeries assessed using Pentacam®
    (Taylor & Francis Ltd, 2025) Aydamirov, Aynura Sariyeva; Ismayilov, Ayna Sariyeva; Emekli, Duygu Topaktas
    Clinical relevance: Horizontal rectus muscle surgeries may cause changes in corneal and anterior segment parameters. Corneal topography is an important device for identifying these alterations. Background: The aim of this work is to evaluate the effects of horizontal rectus muscle surgeries on corneal topography, anterior chamber parameters and corneal wavefront aberrations. Methods: Patients who had horizontal rectus muscle surgery from a single hospital in Turkey between September 2021 and March 2022 were invited to participate. Anterior segment parameters and corneal wavefront aberrations were analysed using a Pentacam device. Axial lengths were measured with an intraocular lens biometric instrument. Tests were performed prior to surgery and 3 months after surgery and results were compared. Parameters with significant change were determined in the whole study group, single muscle and two-muscle groups. The amount of change (Delta) in all parameters was compared between the groups that underwent single muscle and two-muscle surgeries. Results: For this prospective study, 44 eyes of 35 patients were included. The mean age was 18.10 +/- 6.93 (7-28) (mean +/- standard deviation (range)) years. Of the eyes, 22 (50%) underwent single muscle recession surgery. Two-muscle surgeries (recession and resection combination) were performed in 22 eyes. In the whole study group, axial length, anterior corneal surface-steep keratometry, anterior corneal astigmatism and anterior chamber volume increased significantly in the postoperative period (p = 0.002, p < 0.001, p < 0.001, and p = 0.007 respectively). Anterior corneal surface-flat keratometry decreased significantly (p = 0.002). While root mean square (RMS)-Spherical aberration increased significantly for the total corneal surface (p < 0.001), RMS-Trefoil 0 degrees decreased (p = 0.039). Only Delta Steep keratometry and Delta Mean keratometry parameters were changed significantly between the two groups. Conclusions: Horizontal muscle surgeries may cause changes in corneal topography, anterior chamber parameters and corneal aberrations. The number of muscles operated during the surgery does not seem to greatly affect the magnitude of changes that occur.
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    Which is superior for postural stability: contact lens or spectacles?
    (Taylor & Francis Ltd, 2024) Aydamirov, Aynura Sariyeva; Cetin, Emine; Ismayilov, Ayna Sariyeva
    BackgroundThe aim of this work is to compare the use of soft contact lenses and spectacles in terms of postural stability.MethodsPatients who wore both soft spherical or toric contact lenses and spectacles were examined between February and July, 2021. A detailed ophthalmic examination, including contact lens evaluation, was performed. The aim was to fully correct the refractive error and to prescribe the most appropriate spectacle and contact lens correction. After 1 month of use, patients were subjected to the balance test. The balance tests were repeated using the Biodex Balance System (Biodex Inc. Shirley, New York, USA), first with contact lenses and then with spectacles, 15 minutes later. Static and dynamic postural stability indices were compared.ResultsThirty patients were included in the study. The mean age of the study group was 31.33 & PLUSMN; 4.54 (26-40) years. All patients had myopic refractive errors (20 patients with myopia and 10 patients with myopia and astigmatism). The mean spherical equivalent was -2.95 & PLUSMN; 1.81 (-4.50-(-0.50)) D. Static stability index score was found to be statistically significantly better in tests with contact lenses (p = 0.004). Among the dynamic postural stability parameters, overall stability index and antero-posterior stability index (APSI) scores with contact lenses were better than with spectacles, but the difference was not statistically significant (p > 0.05 for both). Medio-lateral stability index (MLSI) score was better in tests with contact lenses (p < 0.001).ConclusionContact lenses may provide better static and dynamic postural balance than spectacles in young patients with myopic refractive errors.