A review of imaging modalities for detecting early keratoconus.

Eye
Xuemin ZhangWuqaas M Munir

Abstract

Early identification of keratoconus is imperative for preventing iatrogenic corneal ectasia and allowing for early corneal collagen cross-linking treatments to potentially halt progression and decrease transplant burden. However, early diagnosis of keratoconus is currently a diagnostic challenge as there is no uniform screening criteria. We performed a review of the current literature to assess imaging modalities that can be used to help identify subclinical keratoconus. A Pubmed database search was conducted. We included primary and empirical studies for evaluating different modalities of screening for subclinical keratoconus. A combination of multiple imaging tools, including corneal topography, tomography, Scheimpflug imaging, anterior segment optical coherence tomography, and in vivo confocal microscopy will allow for enhanced determination of subclinical keratoconus. In patients who are diagnostically borderline using a single screening criteria, use of additional imaging techniques can assist in diagnosis. Modalities that show promise but need further research include polarization-sensitive optical coherence tomography, Brillouin microscopy, and atomic force microscopy. Recognition of early keratoconus can reduce risk of ...Continue Reading

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Methods Mentioned

BETA
KISA
imaging technique
confocal microscopy
light-scattering
atomic force microscopy

Software Mentioned

Pentacam
PS
Casia
Orbscan
CorVis ST
OCULUS Pentacam
Placido

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