Evaluation of corneal sensitivity to mechanical and chemical stimuli after LASIK: a pilot study

Eye & Contact Lens
Fiona StapletonDavid Robinson

Abstract

To evaluate the effect of laser in situ keratomileusis (LASIK) on corneal sensitivity, nerve morphology, and tear film characteristics. A cross-sectional study design was used. Eighteen patients (eight men and 10 women with a mean age of 36.9 +/- 11.2 years) who had undergone bilateral LASIK for low myopia within 18 months of the study and 28 control subjects (16 men and 12 women with a mean age of 27.2 +/- 7.7 years) were enrolled. Central and inferior corneal thresholds to mechanical (air) and chemical (air plus carbon dioxide) stimuli were determined by using a staircase technique. Stimuli of a 1-second duration at 34 degrees C were delivered with a CRCERT-Belmonte aesthesiometer. Images of subbasal nerves in the central cornea were captured with confocal microscopy. Nerve morphology was classified as no nerves, short nerves (<175 microm), or long nerves (>175 microm), with or without interconnections. Noninvasive tear break up time was measured. The phenol red thread test was used to indicate basal tear secretion. Differences between groups were evaluated with analysis of variance, and associations between variables were evaluated with parametric or nonparametric correlation, when appropriate. Central corneal mechanical sen...Continue Reading

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Sep 3, 2013·Experimental Eye Research·Ian D Meng, Masayuki Kurose
Aug 1, 2006·Photomedicine and Laser Surgery
Nov 13, 2013·Current Eye Research·Edoardo VillaniMurat Dogru
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May 5, 2021·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Paramdeep BilkhuJames S Wolffsohn

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