{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T12:41:18Z","timestamp":1790167278682,"version":"4.1.0"},"reference-count":28,"publisher":"Springer Science and Business Media LLC","issue":"5","license":[{"start":{"date-parts":[[2022,6,15]],"date-time":"2022-06-15T00:00:00Z","timestamp":1655251200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ophthalmic Physiologic Optic"],"published-print":{"date-parts":[[2022,9]]},"abstract":"Abstract<\/jats:title>\n \n Purpose<\/jats:title>\n To investigate the validity of Placido\u2010based corneal topography parameters to predict corneoscleral sagittal heights measured by Fourier\u2010based profilometry at various diameters.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n Minimal (Min\n sag<\/jats:sub>\n ), maximal (Max\n sag<\/jats:sub>\n ) sagittal height, toricity (Max\n sag<\/jats:sub>\n \u2009\u2212\u2009Min\n sag<\/jats:sub>\n ) and axis of the flattest meridian (Min\n sag<\/jats:sub>\n ) of 36 subjects (mean age 25.4 SD\u2009\u00b1\u20093.2\u2009years; 21 female) were measured using the Eye Surface Profiler and analysed for diameters (chord length) of 8 to 16\u2009mm (in 2\u2010mm intervals). Furthermore, corneal central radii, corneal astigmatism, eccentricity and diameter were measured using the Keratograph 5\u00a0M.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Using multiple linear regression analysis, the best equation for predicting the sagittal heights for 8\u2009mm (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.95), and 10\u2009mm (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.93) diameters included corneal central radii and eccentricity. The best equation for predicting sagittal heights for 12\u2009mm (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.86), 14\u2009mm (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.78) and 16\u2009mm (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.65) diameters included corneal central radii, eccentricity and corneal diameter. Corneal astigmatism was significantly correlated with sagittal height toricity for 8 and 10\u2009mm diameters (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.50 and 0.29;\n p<\/jats:italic>\n \u2009<\u20090.01), while no correlation was observed for 12, 14 and 16\u2009mm diameters (\n p<\/jats:italic>\n \u00a0=\u00a00.18 to\n p<\/jats:italic>\n \u00a0=\u00a00.76). The axis of the flattest corneal meridian measured by Placido\u2010based topography was significantly correlated with the axis of the flattest meridian measured by Fourier\u2010based profilometry for 8, 10 and 12\u2009mm diameters (\n r<\/jats:italic>\n 2<\/jats:sup>\n \u00a0=\u00a00.17 to 0.44;\n p<\/jats:italic>\n \u2009<\u20090.05), while there was no correlation for 14 and 16\u2009mm diameters (\n p<\/jats:italic>\n \u00a0=\u00a00.48 and\n p<\/jats:italic>\n \u00a0=\u00a00.75). For a typical soft contact lens diameter of 14\u2009mm, 78% of the variance could be determined with a corneal topographer and 68% with keratometry and corneal diameter measurement.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The combination of corneal central radii, eccentricity and corneal diameter measured by Placido\u2010based topography is a valid predictor of the corneoscleral sagittal height in healthy eyes. Scleral toricity and axis of the flattest meridian seem to be independent from Placido\u2010based corneal parameters and requires additional measuring tools.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/opo.13017","type":"journal-article","created":{"date-parts":[[2022,6,15]],"date-time":"2022-06-15T07:33:14Z","timestamp":1655278394000},"page":"1023-1031","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Prediction of anterior ocular surface sagittal heights using Placido\u2010based corneal topography in healthy eyes"],"prefix":"10.1007","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2369-3335","authenticated-orcid":false,"given":"Stefan","family":"Bandlitz","sequence":"first","affiliation":[{"name":"H\u00f6here Fachschule f\u00fcr Augenoptik K\u00f6ln (Cologne School of Optometry) Cologne Germany"},{"name":"School of Life and Health Sciences Aston University Birmingham 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