GP lenses are rigid, so there's no worry about ripping or tearing them. They are also easier to keep clean and don't need to be replaced frequently like soft lenses. With proper care, a single pair of GP lenses can last a year or longer. And since they're long-lasting, GP can be less expensive than soft lenses in the long run. GP lenses may slow the progression of nearsightedness. 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. Different bifocal designs work well for different people, so having many choices is a real plus. Also, many people find that the best combination of near and distance acuity is obtained with GP bifocals. People who have a condition called keratoconus , where the cornea is cone-shaped and causes extreme visual distortion.
People who need contact lenses after refractive surgery. Gas permeable contacts also are used for ortho-k , where specially designed GP lenses are worn during sleep to reshape the cornea and improve vision. Unlike soft lenses, to achieve maximum comfort with gas permeable contacts, you need to wear them regularly though not necessarily every day. If you don't wear your soft lenses for a week, they'll still be comfortable when you put them on a week later.
But if you don't wear your GP lenses for a week, you'll probably need some time to get comfortable again. Also, GP lenses are smaller in size than soft lenses, which means there is a greater risk of gas permeable lenses dislodging from the eye during sports or other activities.
And because gas permeable lenses are designed to move on the eye when the wearer blinks, there is a higher risk of dust and debris getting under the lenses, causing discomfort or a possible abrasion to the cornea. Finally, GP lenses do require care , since they are reused for one year or more.
Since comfort is the primary barrier to greater popularity of gas permeable lenses, hybrid contact lenses are an excellent choice for people who want the clarity of a GP lens and wearing comfort that more closely resembles that of soft lenses. SynergEyes Duette hybrid contacts have a rigid GP center for clear optics, surrounded by a soft outer zone for added comfort. Hybrid contact lenses have a central optical zone that is made of a gas permeable lens material, surrounded by a peripheral fitting zone made of silicone hydrogel or regular hydrogel soft lens material.
The company makes a variety of hybrid lenses sold under the Duette, UltraHealth and SynergEyes brands, including progressive and multifocal hybrid lenses for the correction of presbyopia and designs for the correction of keratoconus and other corneal problems.
For more information about gas permeable lenses, visit the GP contacts educational website provided by the Contact Lens Manufacturers Association. Also, consult with your eye doctor and ask if gas permeable contacts or perhaps hybrid contact lenses are the best choice for your lifestyle and visual needs. Be sure to soak the lenses a minimum of 6 hours before inserting again.
Solution must be neutralized. Always check the expiry date of the solution. When you open a new bottle, write the date you need to discard it generally 3 months after opening on the container in a felt tip pen.
Do not use out-of-date solution. Bacteria can accumulate in contact lens cases. After putting in your contact lenses, the case should always be emptied and air-dried. A new contact lens case is included with every purchase of contact lens cleaning solution. Always throw away the old case and use the new one. The case should only be filled halfway with solution if over-filled, the lens may ride up and be damaged by the lid.
The use of the contact lenses past these dates is NOT recommended as the lenses are not structurally or functionally designed to last any longer. The material often breaks down after this date, causing irritation and poor vision. In most cases you should remove RGP lenses before sleeping. Stagnation of the tear layer behind the lens could lead to a higher risk of eye infection.
Since most of the people who need RGP lenses have already had some trouble with their eyes, further challenge to the surface of the eye would not be advisable. The safest option for waters sports is to wear goggles.
Water contains germs, which may then contaminate the contact lens. Wearing your contact lenses after these activities would be the same as wearing your wet swimsuit. In the event you get water splashed in your eyes, make sure to remove your lenses and clean them thoroughly. Avoid wearing contact lenses in hospital or while unwell. Hospitals are often sources of infection.
When you are sick even just with a cold or flu you risk spreading infection to your eye via contact lenses. You may also find it more difficult to manage your contact lenses safely while you are recuperating. The humidity in aircraft cabins is very low. If you wear your contact lenses they will become very dry and uncomfortable, and you will arrive at your destination with sore eyes.
Please wear your spectacles for flying. While you are first getting used to your lenses you may notice some or all of the following:. Persistent redness, discomfort, pain, blurred vision or if bright lights hurt your eyes. If these occur stop all lens wear and make an appointment to see us. If you want to swim in your lenses then you must make sure to use goggles and then disinfect the lens thoroughly afterwards.
The first thing to do is to take the lens out.
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