contact lens wearers had better end-of-day comfort and better
vision when their lenses needed to be replaced than noncompliant patients, a
As part of a larger study evaluating
compliance with manufacturers' recommendations for contact
lens replacement frequency, 1,344 patients wearing silicone hydrogel contact
lenses were asked to rate their vision and comfort at different times of the
day and when the lenses needed replacing. Subjects were asked to rate their
experience from 0 (very poor) to 10 (excellent).
According to the study, comfort and vision in the morning and when
lenses were new were significantly higher than the scores for the end of the
day and when lenses needed to be replaced. Of total study participants, 29%
were noncompliant with the manufacturers' recommendations, which had a
significant effect on the way lenses felt and functioned at the end of the day
and when they needed to be replaced.
"Optimal subjective performance with [silicone hydrogel] lenses seems to
be facilitated by replacing lenses as recommended," the study authors said.