1. January 2016 13:12
Hydrogel daily disposable contact lenses are increasingly popular around the world and have become the most common contact lens option on some markets. However, lens manufacturers have already come up with their improved variant, made of silicone hydrogel materials.
According to Desmond Fonn, MOptom, and Dr Deborah Sweeney, eye care experts writing for Contact Lens Spectrum, silicone hydrogel materials, introduced about twenty years ago, offer significantly improved oxygen permeability, making them ideal for continuous wear contact lenses. More than a decade after the first reusable silicone hydrogel lenses became available, manufacturers started to produce daily disposables made of the same materials.
The extremely high oxygen permeability offered by such lenses has several key benefits. First of all, they minimise the risk of corneal swelling, a common complication occurring in those who forget to remove their lenses before going to sleep. Secondly, it prevents epithelial microcysts, developing due to chronic hypoxia. In addition, high oxygen permeability prevents myopia progression and corneal curvature changes associated with inadequate levels of air reaching the cornea, the experts emphasise.
Finally, Mr Fonn and Dr Sweeney point out, silicone hydrogel daily disposable contact lenses reduce corneal vascularisation, often resulting from wearing low-Dk/t lenses.