When it comes to contact lenses, most people are familiar with soft lenses to help give them a clear vision for nearsightedness myopia , farsightedness hyperopia , or astigmatism.
When this happens, scleral lenses can be a better option. At Forsight Vision , we help patients from the Long Grove , Illinois area enjoy exceptional vision with scleral lenses. Knowing the advantages and disadvantages is important and can make a big difference in comfortable — and superior — vision. Gas permeable contacts are lenses which are made from hard plastic materials.
Because of this, many patients find that their GP contacts dehydrate less often. Gas permeable lenses give our patients some great benefits. In addition to giving you good vision correction for common vision problems, they also offer:.
This gives you better comfort for all-day wear. GP lenses are tailor-made for each patient. Similar to a custom-designed outfit, GP lenses may be priced higher at first, but they provide greater long-term value. Reduced Likelihood Of Attracting Bacteria. This makes them more hygienic and a healthier choice for your eyes. While gas permeable lenses offer benefits to patients with vision correction needs, there are some disadvantages you should know about. Patients who are used to soft contacts find that it takes a while to get used to GP lenses.
When you blink, you can feel the edge of the lens in your eye. Gas permeable lenses are known to slip off the center of your eye. In some cases, these features also caused problems with PMMA lenses popping off the eye, especially during sports.
And silicone allows oxygen to pass directly through GP lenses to keep the cornea healthy without having to rely solely on oxygen-containing tears to be pumped under the lens with each blink. In fact, modern rigid gas permeable contacts allow more oxygen to reach the cornea than most soft contact lenses although some silicone hydrogel soft lenses are comparable to GP lenses in oxygen transmission.
Because gas permeable contact lenses allow oxygen to pass through them, GP lenses can be made larger than PMMA hard contact lenses, and the edges of GP lenses can be fitted closer to the surface of the eye. These design changes make modern rigid GP lenses more comfortable and easier to get used to than old-fashioned hard contacts. They also help GP contacts stay more securely on the eye when worn during sports and other activities. RGP lenses also provide better vision, durability and deposit resistance than soft contact lenses.
And because they last longer than soft lenses, they can be less expensive in the long term. So why doesn't everyone wear gas permeable lenses? Primarily because soft lenses are instantly comfortable, and GP lenses require an adaptation period before they are as comfortable as soft contacts. Gas permeable contact lenses offer some outstanding benefits over soft lenses.
For one, because GP lenses are made from a firm plastic material, they retain their shape when you blink, which tends to provide sharper vision than pliable soft lenses. GP lenses also are extremely durable. Although you can break them for instance, if you step on them , you can't tear them easily, like soft lenses.
And they're made of materials that don't contain water as soft contact lenses do , so organic materials protein and lipids from your tears do not adhere to GP lenses as readily as they do to soft lenses. With a little care, gas permeable contact lenses can last for years, as long as you don't require a lens prescription change. Though they are less popular than soft lenses, gas permeable contacts are the best choice for many individuals, including:.
In addition to their other advantages, some research suggests that wearing gas permeable lenses may slow the progression of myopia nearsightedness in some children. GPs are also used for orthokeratology, where specially designed contacts are worn during sleep to reshape the cornea and improve vision.
Potential disadvantages of GP lenses compared to soft lenses include: Need for adaptation. Unlike wearing soft lenses which are comfortable right from the start , you may need few weeks before you can wear GP lenses comfortably all day.
Initially, you may be able to wear the lenses only a few hours daily until your corneas adapt to them. But if you can tough it out for those first few days, you may be pleasantly surprised at how comfortable GP lenses become. Many people who switch from soft lenses to gas permeable lenses say GP lenses are more comfortable than soft lenses after their eyes fully adapt and their vision is noticeably clearer. Inability to wear part-time. To fully adapt to GP lenses and to stay comfortable wearing them, you have to wear them every day.
If you stop wearing them for several days, you will be more aware of the lenses on your eyes and you'll have to re-adapt to the lenses. Increased possibility of dislodging. Because they are smaller than soft lenses, gas permeable lenses can dislodge from your eyes during contact sports or if you rub your eyes aggressively. Vulnerability to sand and dust. GP lenses don't conform to the shape of your eye like soft lenses do, so it's possible sand or dust can get under your lenses at the beach or on a windy day.
You can minimize this risk by wearing wrap-style sunglasses outdoors. Higher lens replacement costs. Unlike soft lenses, which come in limited sizes, GP lenses are custom-made to the shape of your eye. This makes GP lenses more expensive to replace if you lose them. Also, it can take up to a week to get a GP lens replaced.
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