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Brief exposure to passive cigarette smoke adversely affects ocular surface

Optom Vis Sci. 2010;87(5):367-372.

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Brief, passive exposure to cigarette smoke increases tear instability and causes damage to the ocular surface epithelia, according to a study.

The prospective study examined the right eyes of 12 soft contact lens wearers without ocular or systemic disease and the right eyes of 10 non-contact lens wearing subjects. Study subjects were exposed to 5 minutes of passive cigarette smoke exposure in a controlled smoke chamber and were observed before exposure and 2 hours after exposure.

According to the study, the mean tear evaporation rates, tear film breakup times and vital staining scores were significantly worse in contact lens wearing subjects as compared with non-contact lens wearing subjects. Tear film breakup time worsened in both groups, but the mean tear evaporation rate and vital staining scores showed considerable increases in subjects not wearing contact lenses.

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