Assessment of the association between in vivo corneal biomechanical changes after corneal cross-linking and depth of demarcation line
| Autor: | Esmaeil Arbabi, Mark Batterbury, Stephen B. Kaye, Argyrios Tzamalis, Riccardo Vinciguerra, Vito Romano |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Keratoconus medicine.medical_specialty Response Parameters Corneal Pachymetry Ultraviolet Rays Corneal Stroma Riboflavin Visual Acuity law.invention Cornea 03 medical and health sciences Young Adult 0302 clinical medicine law In vivo Ophthalmology medicine Humans Prospective Studies Corneal pachymetry Photosensitizing Agents medicine.diagnostic_test Keratometer business.industry medicine.disease Elasticity Biomechanical Phenomena Cross-Linking Reagents Collagen metabolism 030221 ophthalmology & optometry Surgery Female sense organs Collagen business 030217 neurology & neurosurgery |
| Popis: | PURPOSE: To test for an association between stiffening following corneal cross-linking (CXL) and demarcation line depth. METHODS: Sixty-six eyes of 66 patients treated with CXL for progressive keratoconus were included. Dynamic corneal response parameters (DCRs) were measured with the Corvis ST (Oculus Optikgeräte GmbH; Wetzlar, Germany) on the day of CXL and after 1 month. Demarcation line was measured 4 weeks after CXL. A multivariate general linear model was used to test for an association between the change in DCRs and the ratio between demarcation line depth and the postoperative pachymetry. RESULTS: The authors found no significant associations between the change in inverse concave integrated radius (1/R) and the demarcation line ratio ( P = .46), age ( P = .33), sex ( P = .11), preoperative maximum keratometry ( P = .10), and laterality ( P = .82). Similarly, there was no significant correlation between the change in 1/R and the demarcation line ratio ( R 2 = .002 and P = .75). However, there was a significant association between the preoperative values of 1/R and the respective change in 1/R ( P < .0001). The change in 1/R was inversely proportional to the patient's preoperative 1/R; stiffer corneas (lower values of 1/R) were less affected than less stiff corneas ( R 2 = .23, P < .0001). CONCLUSIONS: CXL is associated with changes in DCRs, suggesting a change in corneal biomechanics following CXL. These changes do not appear to be associated with the demarcation line depth. [ J Refract Surg . 2019;35(3):202–206.] |
| Databáze: | OpenAIRE |
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