Rigid Gas Permeable Contacts, Explained
If you wear contact lenses, it is important to know what type of lens is best for your eyes. There are two main types of contact lenses: rigid gas permeable and soft gas permeable. The decision between which one to use depends on your lifestyle, the environment in which you live, and other factors like allergies or dry eye syndrome. This blog post will help explain all the differences between rigid gas permeable and soft gas permeable contacts so that you can make an informed decision about which kind of lens is right for you.
They can be worn by people with all levels of vision correction and they are more durable than other types of contacts! If you're interested in learning more about RGPs and how to choose which ones will work best for your eyes, then read on!
Introduction to Rigid Gas Permeable Contact Lenses
RGP lenses allow your eyes to breathe better. More oxygen can reach the front surface of your eye. This will reduce problems caused by hypoxia (reduced oxygen supply). RGP lenses are smaller than soft ones. This means they will cover less of the front part of your eye.
RGP contact lenses are permeable lenses and hold their shape and move on the eye with each blink. This movement pumps oxygen-containing tears under the lens. Soft lenses conform to the shape of the cornea and have only minimal movement with blinks, so little or no tears circulate under soft lenses.They also provide sharper vision than soft contact lenses, which can become less clear if they start to dry out. Gas permeable lenses are also more accurate in correcting astigmatism.
RGP lenses last longer than soft lenses. They are hard and not easy to tear or rip. With proper care, one pair of gas permeable lenses can last a year or more. And since they're long lasting, they might be less expensive in the long run.
RGP lenses may help slow the progression of nearsightedness in some children. Gas permeable contacts are also used for orthokeratology where specially designed contacts are worn during sleep to reshape the cornea and improve vision.
When Were Rigid Gas Permeable Contact Lenses Invented?
Bausch & Lomb, Inc. revolutionized the contact lens industry by introducing soft lenses in 1971 with their Bausch & Lomb Soflens® line of contact lenses. In 1979, gas permeable contacts were made using a co-polymer of PMMA and silicone and became available for use from some brands.
What Are Rigid Gas Permeable Contact Lenses Made Of?
RGP lenses are often made of oxygen-permeable, flexible plastic containing silicone and fluorine. GP contact lenses are rigid, but NOT the same as old hard contact lenses. Hard contact lenses were made of a type of plastic called polymethyl methacrylate (PMMA). Before 1971, when soft contact lenses were introduced, just about all contact lenses were made from PMMA, which is also called acrylic or acrylic glass.
The non-porous PMMA was created as an eye-friendly alternative to glass for many applications. However, the material is impermeable to oxygen and other gases like the clear front surface of your eye needs a steady supply of oxygen.
PMMA has excellent optical properties and was developed as a shatter resistant alternative to glass for many applications.
Since oxygen cannot pass through a PMMA contact lens, the only way for this element to reach the cornea is if tears come and go. The lens needs to be small enough so that tears can get underneath it. There also needs to be a gap between the edge of the lens and your eye so that tears can come into contact with the cornea.
GP contact lenses are different from PMMA hard contacts because they are more flexible. This is because they are made out of silicone, which lets oxygen pass through them to the eye.
What Brands Make Rigid Gas Permeable Contact Lenses?
Rigid gas permeable contact lenses, commonly abbreviated as RGPs are one of the most durable and effective types of contact lens available. There are many brands of rigid contact lenses, but the most popular ones come from Alcon, Bausch & Lomb, CIBA Vision, CooperVision and Johnson & Johnson.
Introduction to Dimple Contacts
Dimple was founded by a long time contact lens wearer who was tired of running out of lenses and always having to wait for an online sale to then buy in bulk in order to save money. Knowing this had to be a frustration for other areas, we set out to change the landscape for contact lenses in Australia. Dimple was created to offer affordable daily contact lenses without all the big pharma mark ups directly to wearers via a convenient, no-lock in subscription model. Simple. To make sure people like our lenses, we offer a 10 day free trial for only $4.95 shipping. Discover Australia’s best daily contact lenses.
Our Daily Contacts
Here at Dimple we believe perfect vision shouldn't come at a cost to the environment. We try to keep packaging to a minimum and use recyclable materials wherever we can. Each Dimple contact floats in our BioMoist formula, which mimics the eye’s natural tear film and keeps your eyes clean and comfortable all day long. Our daily disposable contacts are made from 43% Methafilcon B and 57% water. Our Radial Edge technology creates a uniform thinness that means you can see clearly and comfortably every day. This keeps your eyes feeling fresh, happy, hydrated, and suitable lenses for those with dry eyes. All our daily lenses include UV protection to help guard you from harmful radiation.
Whether you’re new to contact lenses or a long time wearer, our daily contact lens subscription service is modelled for your convenience. Our lenses will arrive at your doorstep so you’ll never have to worry about running low on contacts again! Not to mention our subscription service is hassle free and you can cancel at any time. We know, it sounds like a steal! If you’re wondering if Dimple Contacts is right for you try us out for free. We’ll send you 10 of our disposable daily contacts in your prescription you’ll only need to cover $4.95 for tracked delivery. Once you’ve finished you can choose your subscription plan. We’ll send you your 30 day supply (60 lenses) with your choice of delivery every 4, 6, 8 or 12 weeks and free delivery. Get the best daily contact lenses.