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Fig. 2 | BMC Ophthalmology

Fig. 2

From: Changes in posterior corneal elevations after combined transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking: retrospective, comparative observational case series

Fig. 2

Correlations between changes in posterior corneal elevation values and ablation depth in eyes that underwent combined transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking and transepithelial photorefractive keratectomy alone. (a) PRK-CXL group, (b) PRK group. PRK-CXL = Combined transepithelial photorefractive keratectomy and accelerated corneal collagen cross-linking; PRK = transepithelial photorefractive keratectomy; Δ = change; Peripheral zone = measurements of 6-mm and 4-mm zone; BFTE = best-fit toric ellipsoid; BFS = best-fit sphere; Central zone = measurements of 2-mm zone and center; max. elevation = measurements of maximal elevation zone

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BMC Ophthalmology

ISSN: 1471-2415

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