High Water Content Contact Lenses
Low water content up to 45 modern silicone hydrogel contact lenses used in contacts that are intended for continual wear.
High water content contact lenses. Contacts with a high water content have a higher oxygen. The original soft contact lenses are now often referred to as low water content soft lenses and contain roughly 38 water when hydrated. High water content lenses are more likely to cause dry eye than those with low water content. As a general rule with conventional soft contact lenses the higher the water content of the lens the more oxygen can pass through the lens to the surface of the eye.
Extreme h2o lenses are available in weekly and two week disposable designs including toric designs for astigmatism. Unlike other organs in the body which receive oxygen from the bloodstream your eyes get oxygen directly from contact with the air. They tend to. Soft contact lenses are categorized by how much water they contain.
High water content lenses contrary to popular belief are generally not the best for dry eyes. Hydrogel lenses are available in three general categories. Contact lenses with a lower water content dehydrate less on the eye than do lenses with a high water content so they could be better for people with dry eyes. This is important for lens comfort and healthy eyes but high water content lenses may be more fragile so are more likely to tear with frequent handling.
Meaning of water content in contact lenses. Contact lens wearers who are more prone to dry eye syndrome will find contact lenses with a lower water content more comfortable to wear. This is very important for lens convenience and healthy eyes but high water content lenses may be more fragile so are most likely to tear with frequent handling. As a rule with conventional soft contact lenses the greater the water content the more oxygen can pass through the lens.
These high water hydrogel lenses have unique water binding properties that allow extreme h2o lenses to retain virtually all their water content throughout the day according to the company. The water content of hydrogel lenses allows oxygen to pass through which is crucial. High water content lenses are lenses with more than 50 water whereas low water content lenses have less than 50 water. Mid water content up to 60 hydrogel contact lenses suitable for most users.
They have almost 100 oxygen permeability. With high water content lenses the moisture in the lens draws out the eye s tears making them more prone to.