27. January 2016 11:30
According to Johnson & Johnson Vision Care researchers, after a whole day of wear, 1-Day Acuvue TruEye contact lenses are characterised by the same level of coefficient of friction as the human cornea.
Speaking to Primary Care Optometry News, Dr Tawnya Wilson, Johnson & Johnson Vision Care’s principal research optometrist, explained that lubricity makes it possible for two surfaces (e.g. a contact lens and an eyelid) to slide against each other smoothly and it is usually assessed on the basis of its coefficient of friction. The expert added that the coefficient of friction is at least as significant for comfort as oxygen transmission and wettability.
The average coefficient of friction of a healthy cornea is about 0.015, Johnson & Johnson researchers found and then tested 1-Day Acuvue TruEye contact lenses both before and after 10-16 hours of wear. The results were quite interesting, as it turned out that the examined contact lenses had virtually the same coefficient of friction after a full day of wear as immediately after removal from packaging. In addition, the obtained values were equivalent to the coefficient of friction of the human cornea, Dr Wilson emphasised.