Ciliary muscle thickness in adults with Down syndrome

Autor: Heather A. Anderson, Melissa D. Bailey, Ruth E. Manny, Chiu‐Yen Kao
Rok vydání: 2022
Předmět:
Zdroj: Ophthalmic Physiol Opt
ISSN: 1475-1313
0275-5408
DOI: 10.1111/opo.12974
Popis: PURPOSE: The relationship between ciliary muscle thickness (CMT), age and refractive error was investigated to determine if CMT, like other anterior ocular anatomy, differs in adults with Down syndrome (DS). METHODS: The CMT of 33 adults with DS was imaged using anterior segment optical coherence tomography. Images from the right eye obtained 45 minutes after cycloplegia (1% tropicamide, 2.5% phenylephrine) were analysed to calculate thickness at 1, 2 and 3 mm posterior to the scleral spur (CMT1, CMT2, CMT3), maximum thickness (CMTMAX) and apical thickness (AT = CMT1 – CMT2). Spherical equivalent refractive error was determined by clinical refraction using both non-dilated and dilated measures. Multivariate regression analysis evaluated the relationship between CMT and refractive error while controlling for subject age. RESULTS: Images were analysed from 26 subjects (mean age (SD) 29 years; mean refractive error (SD): −0.90 (5.03) D, range: −15.75 to +5.13D). Mean (SD) CMT decreased with posterior position (CMT1: 804 (83) μm; CMT2: 543 (131) μm; CMT3: 312 (100) μm). Mean (SD) CMTMAX and AT was 869 (57) μm and 260 (84) μm, respectively. There was a significant linear correlation indicating thinning CMT with increasing age for CMT1 and CMT2 (p ≤0.05). CMT2 and CMT3 had a significant negative correlation (thicker muscle with increasing myopic refractive error) (p ≤0.01). AT had a significant positive correlation (thicker muscle with increasing hyperopic refractive error) (p
Databáze: OpenAIRE
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