Characterisation of ectasia after penetrating keratoplasty in keratoconus eyes using anterior segment optical coherence tomography
| Autor: | Julia M Weller, Lisa Hübner, Friedrich E Kruse, Theofilos Tourtas |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | British Journal of Ophthalmology. :bjo-2022 |
| ISSN: | 1468-2079 0007-1161 |
| Popis: | Background/aimsEctasia of the cornea can occur decades after penetrating keratoplasty (PK), especially in keratoconus eyes. The purpose of this study was to characterise ectasia after PK by morphological findings in anterior segment optical coherence tomography (AS-OCT).MethodsIn this retrospective, single-centre case series, 50 eyes of 32 patients with a history of PK at an average of 25±10 years earlier were included. The eyes were classified either as ectatic (n=35) or as non-ectatic (n=15). The main parameters included central corneal thickness (CCT), lowest corneal thickness at the interface (LCTI), anterior chamber depth, graft–host interface angle at the thinnest point and host cornea–iris angle. Furthermore, steep and flat keratometry readings obtained by AS-OCT (CASIA-2, Tomey) and Scheimpflug tomography (Pentacam, Oculus) were assessed. OCT findings were correlated with clinical grading of ectasia.ResultsThere was a highly significant difference in LCTI, graft–host interface angle and anterior chamber depth (in pseudophakic eyes) between the groups. The ratio calculated by the quotient of LCTI divided by CCT was significantly lower in ectatic than non-ectatic eyes (pConclusionAS-OCT is a helpful tool to recognise and quantify ectasia in post-PK eyes objectively. |
| Databáze: | OpenAIRE |
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