Extend lens replacement intervals popularly
According to research presented at the American Academy of Optometry, contact lenses prescribed for longer replacement intervals can lead to more extreme over-wear, causing undesirable clinical effects. An article from opticianonline revealed some of the concerning figures about this situation. According to results of the research, more than half of wearers of frequent replacement contact lenses did not comply with their prescribed replacement schedule.
Participants in the survey contained two groups: one of them wore two-week contact lenses and the other group wore monthly lenses. Their responses were both disappointing. The research conducted an online sponsor-masked survey which took a random sample of 645 frequent replacement contact lens wearers. The results were quite bad and similar.
In the group containing two-week lens wearers, only 43% of them replaced their lenses as prescribed. There were 65% of them replaced lenses every three weeks, 85% at eight weeks or more and 2% at ten weeks or more. When researchers came to assess the group who wore monthly lenses, only 36% of them maintained lens replacement as required. About 55% only replaced their lenses at five weeks, 23% at eight weeks or more and 14% at 10 weeks or more.
Among all of these unexpected numbers, the most surprising one was the percentage of patients who extended lens replacement to eight weeks or more. Such an interval was significantly longer than a normal requirement. This result considerably surprised the study author Sheila Hickson-Curran who was also director of medical affairs at Vistakon.
The survey of the research is just an example of the popular practice among contact lens wearers. Most wearers will ask their doctors to extend the Rx “this one time” but will not schedule an appointment when they run out of their lenses. Encountering such kind of patients, eye doctors would wish them go to a retail chain for Rx and materials instead.