ed symptoms rated combination 1 more comfortable than combination 2. After eight hours of wear, the difference in ocular comfort (on a 10-point scale) was small but significant: 7.7 for combination 1 versus 7.1 for combination 2. Patients in the symptomatic group also rated combination 1 superior in reducing dry eyes and awareness of contact lenses in the eye.
In contrast, for patients who did not have symptoms before the study, there were no significant differences in ratings of the two combinations. For this asymptomatic group, scores were about the same with either the "most-comfortable" or "least-comfortable" combination.
Switching Improves Symptoms in About Half of Patients
Ocular discomfort is a common complaint among patients with contact lenses, and may contribute to the relatively low percentage of people wearing contact lenses for vision correction. "Properties of the lenses, organic deposits on worn lenses, and even the properties of the solutions used to clean lenses, are often blamed for this," comments Anthony Adams, OD, PhD, Editor-in-Chief of Optometry and Vision Science.
Eye care professionals will often switch the contact lens, type of lens care product, or both, in an attempt to improve comfort. However, it has been unclear how well this common approach works. "Clinicians and researchers are always trying to achieve comfort levels comparable to not wearing contact lenses," Dr Adams adds.
The new study was designed to evaluate the amount of improvement that might reasonably be expected by switching contact lenses and lens care products. The results indicate that "roughly half" of patients with contact lens-related symptoms have improved comfort by switching to a different lens/solution combination.
However, Tilia and coauthors note that, even with the improvement, discomfort still increases toward the end of the day. They call for continued efforts by eye care professionals aPage: 1 2 3 Related medicine news :1
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