{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,22]],"date-time":"2026-06-22T22:49:46Z","timestamp":1782168586400,"version":"3.54.5"},"reference-count":26,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2025,2,17]],"date-time":"2025-02-17T00:00:00Z","timestamp":1739750400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Aim: To evaluate the impact of the position of the upper eyelid on the corneal epithelial thickness, anterior elevation map, and corneal aberrations in patients with unimpaired function of the eyelids. Methods: Sixty-one right eyes were included in this prospective, non-randomized study. The low-positioned eyelid group (LP group) consisted of 30 patients with a mean upper eyelid margin position at 3.45 \u00b1 0.45 mm above the corneal apex at primary gaze. The high-positioned eyelid group (HP group) comprised 31 eyes for which the respective value was 4.56 \u00b1 0.36 mm. The anterior elevation map, corneal aberrations, and epithelial thickness profile were obtained with eyes wide open, using a MS-39 corneal tomograph (CSO, Florence, Italy). The analysis was also performed at measurement points 0.3 mm above and 0.3 mm below the eyelid margin. Results: Significantly thinner epitheliums at 4.5 mm above the center of the cornea on the vertical meridian in the LP group were observed (p &lt; 0.05). Higher anterior elevations and thicker epitheliums of the cornea were observed at the measurement location of 0.3 mm above the upper eyelid\u2019s margin in the HP group (p &lt; 0.05). A negative correlation between the height of the upper eyelid and spherical aberration was noted. Conclusions: The findings provide evidence that the positioning of the upper eyelid in individuals with normal eyelid function influences the epithelial thickness map, the anterior elevation map, and corneal spherical aberrations.<\/jats:p>","DOI":"10.3390\/jcm14041327","type":"journal-article","created":{"date-parts":[[2025,2,17]],"date-time":"2025-02-17T04:40:25Z","timestamp":1739767225000},"page":"1327","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["The Impact of the Position of the Upper Eyelid on the Profile of Epithelial Thickness and the Topography of the Cornea"],"prefix":"10.3390","volume":"14","author":[{"given":"Kroczek","family":"Marta","sequence":"first","affiliation":[{"name":"Division of Ophthalmology and Optometry, Department of Ophthalmology, Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland"},{"name":"Oftalmika Eye Hospital, 85-631 Bydgoszcz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kudelska","family":"Dagmara","sequence":"additional","affiliation":[{"name":"Oftalmika Eye Hospital, 85-631 Bydgoszcz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2321-8411","authenticated-orcid":false,"given":"M\u0142yniuk","family":"Patryk","sequence":"additional","affiliation":[{"name":"Division of Ophthalmology and Optometry, Department of Ophthalmology, Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland"},{"name":"Oftalmika Eye Hospital, 85-631 Bydgoszcz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1332-3592","authenticated-orcid":false,"given":"Ka\u0142u\u017cny","family":"Bart\u0142omiej","sequence":"additional","affiliation":[{"name":"Division of Ophthalmology and Optometry, Department of Ophthalmology, Collegium Medicum, Nicolaus Copernicus University, 85-067 Bydgoszcz, Poland"},{"name":"Oftalmika Eye Hospital, 85-631 Bydgoszcz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,2,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1018","DOI":"10.1016\/j.jcrs.2014.08.040","article-title":"Comparison of dual rotating Scheimpflug\u2013Placido, swept-source optical coherence tomography, and Placido-scanning-slit systems","volume":"41","author":"Lee","year":"2015","journal-title":"J. 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