Scleral topography analysed by optical coherence tomography

Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association
Stefan BandlitzJames Wolffsohn

Abstract

A detailed evaluation of the corneo-scleral-profile (CSP) is of particular relevance in soft and scleral lenses fitting. The aim of this study was to use optical coherence tomography (OCT) to analyse the profile of the limbal sclera and to evaluate the relationship between central corneal radii, corneal eccentricity and scleral radii. Using OCT (Optos OCT/SLO; Dunfermline, Scotland, UK) the limbal scleral radii (SR) of 30 subjects (11M, 19F; mean age 23.8±2.0SD years) were measured in eight meridians 45° apart. Central corneal radii (CR) and corneal eccentricity (CE) were evaluated using the Oculus Keratograph 4 (Oculus, Wetzlar, Germany). Differences between SR in the meridians and the associations between SR and corneal topography were assessed. Median SR measured along 45° (58.0; interquartile range, 46.8-84.8mm) was significantly (p<0.001) flatter than along 0° (30.7; 24.5-44.3mm), 135° (28.4; 24.9-30.9mm), 180° (23.40; 21.3-25.4mm), 225° (25.8; 22.4-32.4mm), 270° (28.8; 25.3-33.1mm), 315° (30.0; 25.0-36.9mm), and 90° (37.1; 29.1-43.4mm). In addition, the nasal SR along 0° were significant flatter than the temporal SR along 180° (p<0.001). Central corneal radius in the flat meridian (7.83±0.26mm) and in the steep meridian (...Continue Reading

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Citations

Aug 1, 2018·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Stephen J VincentMichael J Collins
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Dec 10, 2020·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Alexandra JandlStefan Bandlitz
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