Polymethyl methacrylate, also known as PMMA, was the material of choice for hard contact lenses for a long time. Because air could not get through the lenses, it was uncomfortable to wear them. It needs the user to blink regularly to keep the eyes lubricated and oxygenated.
Gas permeable contact lenses in Sri Lanka have since been produced, which is a good thing. Your eyes will be able to “breathe” easier with GP lenses. More oxygen reaches the front surface of the eye with GP lenses, and when purchasing GP contact lenses online in Sri Lanka, you won’t have to worry about their reliability. Hypoxia-related ocular issues are less likely as a result of reduced oxygen supply.
Silicone is used in most gas permeable lens materials, making GP lenses more flexible than PMMA hard contacts. Furthermore, silicone lets oxygen travel straight through GP lenses, allowing the cornea to remain healthy without relying entirely on oxygen-rich tears forced under the lens with each blink.
The vision with GP lenses is clearer. GP lenses give clearer vision than soft lenses, which can change shape and clarity as they dry out since they are custom-machined into a smooth surface and maintain their structure in the eye. Astigmatism correction with gas permeable lenses is also steadier and more accurate.
GP lenses are more durable. Because GP lenses are hard, there's no risk of them ripping or tearing. They're also easy to clean and don't require as much replacement as soft lenses. A single pair of GP lenses can last a year or longer with adequate care. In the long term, GP lenses can be less expensive than soft lenses since they endure longer.
Near-sightedness may be slowed with the use of GP lenses. Wearing gas permeability lenses, in addition to their other benefits, may reduce the growth of myopia, more commonly called near-sightedness, in some youngsters, according to some research. Orthokeratology, in which specially made contacts are worn during sleep to restructure the cornea and increase longevity, is also performed by GPs.
Gas permeable contact lenses have a sturdy substance, which allows them to be better viewed. This allows them to keep their shape even when you blink. As a result, you won't have to refocus or readjust your lenses on a regular basis. They also don't need water to keep their shape.
GP lenses are also incredibly long-lasting. They can be broken, but unlike soft lenses, they cannot be readily torn. Organic components (protein and lipids) from your tears do not stick to GP lenses as readily as they do to soft lenses, since they are made of materials that do not contain water, as soft contact lenses do. Gas permeable contact lenses can survive for years with proper care, as long as you don't need to change your prescription.
Every gas permeable contact lens pair is built to order for each patient, taking into account their unique curvature, size, and corneal shape. Their capacity to convey oxygen decreases eye problems like dry eyes caused by low oxygen levels, which are typical of many brands of soft and hard lenses. Because GP lenses are smaller than soft contacts, they occupy less of your eye's surface area. While it may take a bit of time to get used to, many people feel that they are just as pleasant as, if not more so, than softer contacts.
These lenses are less likely to tear and are easy to disinfect due to their strength and longevity. Most gas-permeable lenses must be taken out each night for cleaning. However, some varieties can be worn for up to 30 days. Before sleeping with your contact lenses, always check with your optometrist.
Because the biggest hurdle to increased adoption of gas permeable lenses is comfort, hybrid contact lenses are an excellent idea for people who want the clarity of a GP lens with the wearing convenience of soft lenses. A gas permeable lens material is used in the core optical zone of hybrid contact lenses, which is surrounded by a silicone hydrogel or normal hydrogel soft lens material in the peripheral fitting zone.
Now that you know the benefits of gas-permeable contact lenses, you should have enough information to make an educated selection – but there's always more to learn. Therefore, visiting your local optometrist is the best way to figure out what type of gas-permeable contact lenses will be perfect for you.
