{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,28]],"date-time":"2026-04-28T19:28:52Z","timestamp":1777404532885,"version":"3.51.4"},"reference-count":33,"publisher":"Springer Science and Business Media LLC","issue":"6","license":[{"start":{"date-parts":[[2023,6,29]],"date-time":"2023-06-29T00:00:00Z","timestamp":1687996800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ophthalmic Physiologic Optic"],"published-print":{"date-parts":[[2023,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To compare the repeatability of central corneal thickness (CCT) measurements taken with a new handheld pachymeter (Occuity PM1 pachymeter) and to assess its agreement with ultrasound biometry and two commercially available optical biometers in participants with normal eyes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Three consecutive CCT measurements of the right eye of 105 participants with normal corneas were acquired by the PM1 pachymeter, Lenstar LS 900 and Oculus Pentacam HR in a random order. This was followed by three measurements with a handheld ultrasound pachymeter (UP) (Pachmate 2). Repeatability and the repeatability limit were calculated for each device and Bland\u2013Altman limits of agreement (LoA) were determined for the PM1 pachymeter compared to the other devices.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The mean CCT (\u00b1SD) was 551.04\u2009\u00b1\u200933.43, 558.62\u2009\u00b1\u200931.46, 549.41\u2009\u00b1\u200931.00 and 539.73\u2009\u00b1\u200929.50\u2009\u03bcm for the PM1 pachymeter, UP, Lenstar and Pentacam, respectively. The repeatability limits (expressed as the within subject SD for repeat measurements) were 14.02, 13.68, 4.99 and 9.90\u2009\u03bcm, respectively. The closest agreement was between the PM1 and Lenstar (mean difference\u2009=\u2009\u22121.63\u2009\u03bcm with LoA 10.72\u2009\u03bcm below and 13.97\u2009\u03bcm above the readings obtained with the Lenstar). The PM1 underestimated CCT compared to UP (mean difference\u2009=\u20097.58\u2009\u03bcm, LoA 24.63\u2009\u03bcm below and 9.47\u2009\u03bcm above UP). The agreement was lowest between the PM1 and Pentacam (mean difference\u2009=\u2009\u221211.30\u2009\u03bcm, LoA between 4.29 and 26.89\u2009\u03bcm).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The PM1 pachymeter shows excellent precision for CCT measurements across a range of corneal thicknesses in normal eyes and provides a safe and easy\u2010to\u2010use alternative to ultrasound pachymetry.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/opo.13199","type":"journal-article","created":{"date-parts":[[2023,6,29]],"date-time":"2023-06-29T06:40:49Z","timestamp":1688020849000},"page":"1524-1530","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Repeatability and agreement of central corneal thickness measurements with a new handheld non\u2010contact pachymeter"],"prefix":"10.1007","volume":"43","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2031-6390","authenticated-orcid":false,"given":"John G.","family":"Lawrenson","sequence":"first","affiliation":[{"name":"Centre for Applied Vision Research, School of Health and Psychological Sciences City, University of London  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Simranjit","family":"Gill","sequence":"additional","affiliation":[{"name":"Moorfields Eye Hospital, NHS Foundation Trust  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Isra","family":"Masuid","sequence":"additional","affiliation":[{"name":"Moorfields Eye Hospital, NHS Foundation Trust  London UK"},{"name":"Royal Berkshire, NHS Foundation Trust  Reading UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fardip","family":"Rashid","sequence":"additional","affiliation":[{"name":"Moorfields Eye Hospital, NHS Foundation Trust  London UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,6,29]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.exer.2003.09.017"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.3129\/can.j.ophthalmol.06-108"},{"key":"e_1_2_11_4_1","unstructured":"European Glaucoma Society.Terminology and guidelines for glaucoma 5th ed.2020. 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