u/fgc_eyecare

Silicone hydrogel is a water-based plastic material used in soft contact lenses. It is an advanced, highly breathable lens material that allows significantly more oxygen to reach the cornea than other materials. The high oxygen permeability of the silicone hydrogel not only provides lasting comfort, but it also helps keep eyes healthy in the long term.

Although optometrist’s recommend contact lenses based on an individual’s vision and lifestyle needs, they often prefer contact lenses made from this material to hydrogel ones. Let’s learn the reasons behind the same:

• Superior oxygen permeability (Dk/t) – Silicone hydrogel lenses allow much more oxygen to permeate through the contact lens and reach the surface of the eye in comparison to hydrogel lenses. These high-permeability lenses help keep the cornea healthy in the long run by protecting against hypoxia (low oxygen levels).
• Long-lasting comfort – Since the eyes get a high level of oxygen throughout wear, silicone hydrogel contact lenses offer better comfort compared to hydrogel lenses. Reusable lenses, such as monthlies and two weeklies, made from silicone hydrogel, ensure they remain breathable and comfortable throughout their wearing cycle.
• Better water retention offering longer wear duration – Contact lenses made from silicone hydrogel can be worn for a longer duration (up to 16 hours) than those made from hydrogel. These lenses are ideal for individuals with an active lifestyle, who spend long hours on digital screens or whose eyes are more susceptible to dryness.
• Suitable for extended wear – Some of the contact lenses made from silicone hydrogel can also be worn as extended wear lenses if recommended by the optometrist. They are suitable for continuous wear throughout the day and night for a specific period (typically a week) without the need to take them out.
• Improved eye health – As the silicone hydrogel contact lenses allow more oxygen to pass through them, they help reduce the risk of complications such as redness and corneal hypoxia.

Hope this was of help!