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Evaluation of corneal structures in myopic eyes more than twenty‐two years after photorefractive keratectomy
Author(s) -
Montorio Daniela,
Cennamo Gilda,
Menna Feliciana,
Donna Piero,
Napolitano Pasquale,
Breve Maria Angelica,
Fiore Ugo,
Cennamo Giovanni,
Rosa Nicola
Publication year - 2020
Publication title -
journal of biophotonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 66
eISSN - 1864-0648
pISSN - 1864-063X
DOI - 10.1002/jbio.202000138
Subject(s) - scheimpflug principle , photorefractive keratectomy , ophthalmology , medicine , ablation , corneal topography , photoablation , cornea , optics , laser , excimer laser , physics
The aim of this study is to evaluate corneal epithelial thickness (CET), corneal densitometry (CD) in 84 myopic eyes (57 patients) more than 22 years after photorefractive keratectomy, using anterior segment‐optical coherence tomography (AS‐OCT) and Scheimpflug imaging system. The CET was significantly higher in all operated eyes than in unoperated eyes in central sector. A statistically significant increase in CD in corneal anterior layer of central sector was shown in groups of operated eyes with greater ablation depth respect to unoperated eyes. While there was no significant difference in CD between the operated eyes groups with lower ablation depth and unoperated eyes. A significant trend toward higher values in anterior CD with deeper ablations in central sector was found. These noninvasive imaging techniques allow to better understand the corneal remodeling process after photoablation and to monitor the patients over time.