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To assess the difference in the corneal biomechanical properties in healthy subjects with and without their contact lenses
Author(s) -
DE FAYS A,
POURJAVAN S
Publication year - 2012
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2012.f006.x
Subject(s) - contact lens , ophthalmology , medicine , cornea , significant difference , mean difference , intraocular pressure , effects of long term contact lens wear on the cornea , confidence interval
Purpose To assess the difference in the corneal biomechanical properties in healthy subjects with and without their contact lenses. Methods The study included one eye of 20 healthy subjects who wear monthly, soft contact lenses for a refractive error. The subjects were asked, not to wear their contact lenses during at least 12 hours. The central corneal thickness was measured at least 30 minutes before other examination using an ultrasonic pachymeter. The corneal biomechanical properties and the intraocular pressure (IOP) were measured by ocular response analyzer (ORA). The measurements were repeated immediately with the contact lenses. A student t‐test was used to assess the difference between the measurements with and without contact lenses. Results The mean corneal hysteresis without and with contact lenses were 10.88 ± 1.8 mmHg (9.6‐13.7 mmHg) and 10.92 ± 1.7 mmHg (8.5‐13.4 mmHg), respectively (p = 0.16). The mean corneal resistance factor was 9.96 ± 1.7 mmHg (7.9‐12.6 mmHg) without contact lenses compared with 9.95 ± 2.1 mmHg (7.6‐12.3 mmHg) with the contact lenses (p= 0.21) There was no significant difference nor in corneal‐compensated IOP neither in Goldmann‐correlated IOP, with or without the contact lenses. Conclusion Our results suggest that ORA‐generated parameters are not influenced by the contact lens itself. Further longitudinal studies should be performed to establish the eventual changes of the biomechanical parameters with duration of the contact lens wear.