{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T17:46:07Z","timestamp":1792172767949,"version":"4.4.0"},"reference-count":0,"publisher":"GN1 Sistemas e Publicacoes Ltd.","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ABO"],"published-print":{"date-parts":[[2026]]},"abstract":"<jats:p>Purpose: To investigate tomographic and biomechanical screening artifacts associated with primary\npterygium that may mimic keratoconus-like patterns before and after surgical excision. Methods:\nTwenty-five eyes with primary pterygium underwent Scheimpflug corneal tomography and dynamic\ncorneal response analysis before surgery and 3 months after excision. Tomographic and biomechanical\n(parameters were compared using paired analyses. The proportions of eyes exceeding established\nscreening thresholds (Tomographic Biomechanical Index \u22650.29; Corvis Biomechanical Index \u22650.5)\nwere compared using McNemar\u2019s test. Results: BAD-D decreased significantly after surgery (1.69\u00b11.22\nvs. 1.36\u00b10.90; Wilcoxon, p=0.027). Pentacam irregularity indices also improved significantly, including\nISV (51.16\u00b144.21 vs. 36.88\u00b142.94; p&lt;0.001) and IVA (0.39\u00b10.29 vs. 0.30\u00b10.32; p=0.006). No significant\nchanges were observed in maximum keratometry, corneal astigmatism. The mean CBI decreased\nsignificantly (0.494\u00b10.353 vs. 0.384\u00b10.298; p=0.048), and the proportion of CBI-positive eyes (\u22650.5)\ndeclined from 48% (12\/25) to 28% (7\/25). In contrast, the mean tomographic Biomechanical Index did\nnot change remained unchanged (0.519\u00b10.313 vs. 0.534\u00b10.323; p=0.909), and the proportion of Tomographic\nBiomechanical Index-positive eyes (\u22650.29) remained 76% (19\/25). The number of topographic\nkeratoconus classification positive eyes decreased from 8 (32%) to 3 (12%). Integrated Radius showed\nno significant postoperative change (p=0.131). Conclusions: Primary pterygium was associated\nwith tomographic and biomechanical screening abnormalities that mimicked keratoconus-like patterns.\nFollowing surgical excision, anterior tomographic parameters improved, and the proportion\nof Corvis biomechanical index-positive eyes decreased. In contrast, Tomographic Biomechanical\nIndex remained elevated in most eyes, and stiffness-related biomechanical parameters showed\nno significant change. These findings demonstrate a differential postoperative response among\nscreening indices and suggest that pterygium-induced anterior corneal surface distortion may\nincrease false-positive keratoconus screening rates, particularly for Tomographic Biomechanical Index,\nwhich may remain elevated even after lesion removal.<\/jats:p>","DOI":"10.5935\/0004-2749.2025-0385","type":"journal-article","created":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T16:54:00Z","timestamp":1792169640000},"page":"1-8","source":"Crossref","is-referenced-by-count":0,"title":["Keratoconus false-positive screening rates in eyes with pterygium: tomographic and biomechanical artifacts"],"prefix":"10.5935","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3665-6522","authenticated-orcid":false,"given":"Pablo Felipe","family":"Rodrigues","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8983-7947","authenticated-orcid":false,"given":"Felipe A. Casseb","family":"dos Santos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4441-4304","authenticated-orcid":false,"given":"Bernardo Kaplan","family":"Moscovici","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6919-4606","authenticated-orcid":false,"given":"Renato","family":"Ambr\u00f3sio Jr","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9448-8742","authenticated-orcid":false,"given":"Mauro","family":"Campos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4510-1289","authenticated-orcid":false,"given":"Walton","family":"Nose","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3948","published-online":{"date-parts":[[2026]]},"container-title":["Arquivos Brasileiros de Oftalmologia"],"original-title":[],"link":[{"URL":"https:\/\/www.scielo.br\/j\/abo\/a\/rbFm7CRJt75kzRtVdjfB4Hh\/?lang=en&ilang=pt_BR","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T16:54:08Z","timestamp":1792169648000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.scielo.br\/j\/abo\/a\/rbFm7CRJt75kzRtVdjfB4Hh\/?lang=en&ilang=pt_BR"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026]]},"references-count":0,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2026]]},"published-print":{"date-parts":[[2026]]}},"URL":"https:\/\/doi.org\/10.5935\/0004-2749.2025-0385","relation":{},"ISSN":["0004-2749"],"issn-type":[{"value":"0004-2749","type":"print"}],"subject":[],"published":{"date-parts":[[2026]]}}}