by Joel Harrison
16. June 2011 08:15
Several scientists decided to investigate how multifocal contact lenses affect accommodation. Their pilot study included six presbyopic patients (average age: 51.2 years) who had not been wearing contact lenses and who were given Focus Progressive and Purvision multifocal contact lenses. They wore those lenses successively, at random order, and the researchers assessed their accommodative response, visual acuity and contrast sensitivity. In addition, a control group consisting of eight patients (average age: 28.6 years) without presbyopia was also evaluated.
No statistically significant differences in distance visual acuity were found in the patients from the study group between the initial measurements and the measurements taken after wearing the contact lenses. However, when it comes to near visual acuity, the results were slightly better after wearing PureVision High Add lenses. In addition, the researchers found out that the multifocal contact lenses that were used during the study do not affect accommodative functions.
However, research carried out on larger groups of patients is necessary to arrive at definite conclusions with respect to the subject of the described study.
Subscribe