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Located on W. Drake Rd. in Ft. Collins West of Colorado State University Veterinary Teaching Hospital

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Home » Contact Lenses » Gas Permeable (GP) Contact Lenses

Gas Permeable (GP) Contact Lenses

Advantages of Gas Permeable Contact Lenses In Fort Collins, CO

  • GP lenses allow your eyes to “breathe” better. GP lenses allow more oxygen to reach the front surface of the eye. This reduces the risk of eye problems caused by hypoxia (reduced oxygen supply). Gas permeable lenses provide a better oxygen supply than most soft lenses because:
    • The silicone-containing lens materials of GP lenses are more permeable to oxygen than many soft lens materials (though new “silicone hydrogel” soft lenses are comparable to GPs in oxygen transmission).
    • GP lenses are smaller in diameter than soft lenses, so they cover up less of the front surface of the eye (the cornea).
    • Gas permeable lenses 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.
  • GP lenses provide sharper vision. Because they are custom-machined to a smooth surface and maintain their shape on the eye, GP lenses provide sharper vision than soft lenses, which can fluctuate in shape and clarity if they start to dry out. Gas permeable lenses also provide a more stable and accurate correction of astigmatism.
  • GP lenses last longer. 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.

The downside of GP contact lenses

So why doesn’t everyone wear GP lenses? 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.So it’s a good idea to purchase a spare pair to avoid the inconvenience of being without your GP lenses if you lose or break one.

Best of both worlds?

Since comfort is the primary barrier to GP use, an interesting innovation is the hybrid contact lens. These lenses have a GP center, surrounded by a soft lens “skirt.” The goal of hybrid lenses is to provide the clarity of a gas permeable lens and wearing comfort that rivals that of a soft lens.

Call our Fort Collins, CO optometrist for a trial fitting!

To see if gas permeable lenses are right for you, call our office for more information and to schedule a trial fitting.

As of Tuesday evening, March 17th, the CDC has recommended that all routine eye care be deferred until further notice, in order to slow the transmission of COVID-19 through our community. We will follow their recommendations and close our office to regular eye exams until further notice.

Please be assured that we are still available to triage all urgent and emergent issues as well as help you with routine matters during this challenging time.

What does this mean?

1) If you are scheduled for an annual eye examination our office will contact you to reschedule
2) If you need to replace glasses or contact lenses and need an extension on your prescription, please contact us and we will assist you in obtaining some until you can come in for a visit.
3) If you are running out of medication please contact us and we can transmit a refill electronically to your pharmacy.
4) If you have an ocular emergency we are, as always, available to help you at any time. Call us at 970-221-4811.
5) If you have an issue that cannot wait for an office visit, contact us and we will schedule a FaceTime, Skype or telephone appointment with one of our doctors. Medicare has temporarily relaxed its telehealth rules to allow this type of communication during the pandemic crisis. Other insurers may follow suit and allow for reimbursement of virtual care costs. The consultation must be initiated at your request.
6) During this period of social distancing and quarantine, we must all do our part by restricting activities outside the home except for getting medical care. Do not go to work, school, or public areas. Avoid using public transportation, ride-sharing, or taxis.
7) Please remember that 80% of COVID-19 cases are mild and resolve within a week. However, if you feel your symptoms are worsening, call ahead before visiting your doctor’s office or emergency department and tell them you have or may have COVID-19. This will help the office protect themselves and other patients.

The CDC has many wonderful resources. Arming yourself and your family with clear information will help you avoid undue stress.https://www.cdc.gov/coronavirus/2019-ncov/prepare/prevention.html https://www.cdc.gov/coronavirus/2019-ncov/prepare/managing-stress-anxiety.html

We have asked our staff to stay home until further notice to protect them, our patients, our city, our nation, and our planet. Despite the financial and emotional hardships this will cause, we ask every one of you to do the same.

Together we will weather this storm.

With sincerest wishes for your continued good health, we remain at your service,

Eyecare Associates