For many opticians, the over-arching benefit of wearing silicone hydrogel contact lenses is the reduction in hypoxia-related symptoms (discomfort associated with a lack of oxygen reaching the cornea), caused by some hydrogel soft lenses. The result has been fewer cases of contact lens-related problems and severe keratitis, caused by wearing contacts continuously.

It is also thought that, for many, the use of highly oxygen-permeable lenses allows them to wear their contacts for longer hours, without experiencing discomfort as they would with standard soft hydrogel lenses. The use of silicone hydrogel materials in these lenses also means that a larger variety of lens designs can be manufactured.

However, everyone's eyes are different, and some people do report more 'awareness' of their lenses with silicone hydrogel contacts. There is even some research to suggest that silicone hydrogel lenses attract certain deposits more than regular hydrogel lenses. Some lens care products may also not be as effective on silicone hydrogel lenses.

Furthermore, in some instances silicone hydrogel lenses have been thought to be associated with a higher chance of developing inflammation of the cornea, as well as some other complications, although the reasons for this are as yet unclear.

Some researchers also say that there is no improvement in end-of-day tiredness of eyes from wearing silicone hydrogel contact lenses, and, in America, the only FDA-approved contact lens for dry eyes in a standard hydrogel lens.

However, as with every form of eyewear there are pros and cons. Therefore, Vision Direct advises that, before making any decisions, you should first consult your options and your requirements with your optician.

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What are silicone hydrogel contact lenses?