If you prefer to wear contact lenses instead of glasses for better vision, there are several types to choose from.
Both hard and soft contact lenses have their pros and cons. Which one is right for you depends on your viewing needs, lifestyle and personal preferences.
If you are considering hard contact lenses, read on to learn about the pros and cons of these lenses and how to use them safely.
The most commonly prescribed hard contact lenses are rigid gas permeable (RGP) lenses. They are more comfortable and safer to wear than previous types of hard lenses, such as B. conventional lenses made of polymethyl methacrylate (PMMA). PMMA lenses are rarely prescribed today.
RGP lenses are made from a flexible plastic material that typically contains silicone. This lightweight material allows oxygen to pass right through the lens to reach your eye’s cornea.
Your cornea is the transparent, outermost layer of your eye. Your cornea refracts light and serves as the outermost lens of your eye. If your cornea doesn’t get enough oxygen, it can swell. This leads to blurry or blurry vision and other eye problems.
PMMA lenses did not allow oxygen to pass through the lens. The only way oxygen could reach the cornea was that with every blink, tears washed under the lens.
To allow tears to move under the lens, PMMA lenses were quite small. In addition, there had to be a gap between the lens and the cornea. This made wearing PMMA lenses uncomfortable and made it easier for the lenses to pop out, especially during sports.
Because RGP lenses let oxygen through, these lenses are larger than PMMA lenses and cover more of your eye.
Also, the edges of RGP lenses fit better to the surface of your eye. This makes them more comfortable to wear compared to the older version. It also allows the lenses to stay on your eyes more securely.
Hard contact lenses are used to correct common vision problems known as refractive errors.
Refractive errors occur when the shape of your eye prevents incoming light from being correctly focused on the retina. The retina is a layer of light-sensitive tissue at the back of the eye.
There are several types of refractive errors that can be corrected by wearing RGP hard contact lenses, including:
Most of these conditions can also be corrected with soft contact lenses.
RGP hard contact lenses have several advantages compared to soft contact lenses. Let’s take a closer look at these benefits:
RGP hard contact lenses also have some disadvantages. Here’s a look at some common issues with these lenses.
If you want your hard contact lenses to last as long as they should, it’s important to take good care of them. Taking care of your lenses also reduces the risk of eye infection or scratching your cornea.
- Daily cleaning. Daily cleaning of hard contact lenses is essential. It is also important to clean your contact lens case daily
- Do not use tap water. The germs in tap water can stick to contact lenses. Instead, use cleaning solutions specifically designed for hard contact lenses.
- Take precautions when swimming or bathing. Because tap water can increase your risk of eye infection, avoid wearing your contact lenses while swimming or bathing. Or you can wear swimming goggles that prevent the water from contacting your lenses.
- Change the contact lens case regularly. Even though your hard contact lenses can last for several years, your lens case should be replaced every few months to avoid contamination with germs that can cause eye infections.
- Avoid saliva. Never clean your contact lenses with saliva. Your saliva contains bacteria that can damage your eyes.
- Clean your hands. Make sure your hands are clean every time you touch your contact lenses. Wash them thoroughly before putting or removing your contact lenses in your eye.
- Don’t sleep in your lenses. This can increase the risk of eye infection.
Rigid gas permeable (RGP) lenses are the most commonly prescribed rigid contact lenses today. They usually provide sharper and clearer vision than soft contact lenses. They also last longer and are often cheaper than soft lenses in the long run.
In addition, certain conditions, including astigmatism, can be corrected more efficiently with hard contact lenses.
However, hard contact lenses usually take longer to adjust to and they may not be as comfortable as soft contact lenses. Talk to your eye doctor to find out what type of contact lenses are best for you and your vision needs.