30. January 2016 14:45
Cholesterol is one of the substances that can build up on the surface of contact lenses and affect vision and comfort. Recently, a team of researchers led by Dr H. Walther have carried out a special study to compare how much cholesterol can be taken up by silicone hydrogel and conventional hydrogel contact lenses.
During the study, whose results have been published in Optometry and Vision Science, the scientists incubated three silicone hydrogel and four conventional contact lenses in a solution containing the most important tear film components for up to 16 hours. They found that cholesterol deposits were larger on silicone hydrogel contact lenses than on hydrogel ones. In addition, the tests revealed that cholesterol build-up was continuous and did not slow down even after 16 hours of incubation.
According to the authors of the study, the fact that silicone hydrogel daily disposable contact lenses are significantly more susceptible to cholesterol deposits should be taken into account by eye care practitioners when fitting patients in whom tear film may contain excessive amounts of lipids.