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The human eye is a bodily organ that is dependent upon an adequate and balanced supply of water and, therefore, is prone to irritation when exposed to low humidity. The purpose of this study was to examine the influence of two humidity conditions (10% rh, 30% rh) on the comfort of the human eye with and without soft contact lenses over a 10-hour period. The results showed that acuity, refractive errors, and cornea curvatures of the eye were not significantly affected by humidity. However, a perceivable level of annoyance was felt in the eyes with and without contact lenses at relative humidities of 30% or less. This type of eye discomfort was most pronounced after an exposure exceeding four hours.

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Citation: ASHRAE Transactions, 1988, vol. 94, pt. 1, Dallas, TX