Most hard lens are made of gas-permeable materials that allow oxygen to reach the cornea. This reduces problems that may occur when the cornea does not get enough oxygen. They correct refractive errors, including astigmatism, with no distortion.
Gas Permeable contact lenses or hard lens are rigid, but they shouldn’t be confused with old-fashioned hard contact lenses, which are now essentially obsolete. Hard lens 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, as well being referred to by the trade names Plexiglas, Lucite, Perspex and others.
These design characteristics made many people very aware of PMMA lenses on their eyes or caused discomfort that made wearing the lenses impossible. In some cases, these features also caused problems with PMMA lenses popping off the eye, especially during sports.
Hard lens are more durable than soft contact lenses. They’re also more breathable, allowing more oxygen to the cornea. These contact lenses must be removed for cleaning and disinfection at night, but some can be worn for a week or even 30 days.
It might take a few days or up to a few weeks to adjust to rigid gas permeable contact lenses. However, if your prescription doesn’t change and you take care of your lenses, you can use the same pair for up to two to three years.
Advantages of Hard Lens
Hard lens have their own advantages beyond the previously mentioned cost and hygiene benefits. Some other big advantages of RGP lenses include:
- Durability. One of the primary reasons RGP lenses are so cost-effective is their durability.Hard lens last an average of two years, far longer than traditional soft contacts.
- Astigmatism correction. Some people who have astigmatism are told they cannot wear soft contacts. These same individuals can often wear Hard lens. The rigid nature of RGP contacts helps to provide clear, stable vision correction for those with astigmatism.
- No hydration requirement. Hard lens do not need hydration, and they do not dehydrate. This is a significant difference compared to soft lenses, which often dehydrate. Dehydrated soft lenses can irritate your eyes and will generally provide worse vision correction.
- Comparable overall comfort. While Hard lens do have a warmup period, they tend to feel perfectly fine after a few weeks of use. They are smaller than soft lenses, and some people even find they prefer the feel of Hard lens to soft lenses once they’ve grown used to them.While it may seem like their firm material causes any initial discomfort, it is usually their small size that takes getting used to. Hard lens are cut pretty precisely to the needs of your eye, so they can fit extremely well in most cases.
- Resistant to damage. RGP lenses need to be kept clean like any type of contact, but they are less likely to tear or break when being handled. The lenses keep their shape, thanks to their firm material, and they are unlikely to damage your eye if used properly. This doesn’t mean they are unbreakable; you should still handle them with care.
Discuss your options further with your eye doctor. Consider your environment and any hobbies as you decide whether soft contacts or hard contacts are better for you.You can get consultation from our optometrist for which is suitable with you.Book your appointment now at https://www.malayaoptical.com/