How do rgp lenses work

If you can only get 10 minutes longer per day that is OK. Often the slower you get used to the lenses, the better your long term comfort will be. Your eyes do undergo some physiological changes when you start wearing GP lenses, so you need to slowly get used to them.

At the first sign of discomfort take the lenses out and try for a bit longer the next day. Remove the lens from its case by putting your finger onto the lens surface where it should stick.

You should then be able to lift the lens out. Inserting your RGP contact lenses. Note: If the lens is not central out on the white of your eye gently move the lens by pressing on it through your eyelids. Or close your eye and again move the lens by pushing through your eyelid. The lens can come out quite quickly so ensure you are ready with your hand to catch the lens.

As you blink the lens will come out so you need to be ready to catch the lens with your other hand cupped under your eye. This makes it much easier to remove the lenses but you need to remember to carry it with you whereas if you learn the blink method you will always have your fingers with you! The lens should now be stuck to the sucker and it can be removed. Again slide the lens off sideways. Wash with soap and running water, remembering to rinse your hands thoroughly.

Dry your hands with a towel. It is important to clean your RGP contact lenses daily to maintain the highest standards of comfort and visual clarity. Each day after you remove your lenses, you must clean them prior to overnight storage. It also increases the comfort of your contact lenses. NEVER use saliva, saline or water of any type.

Tap, distilled and bottled water and particularly saliva contain bacteria and viruses which may be absorbed by the contact lens and cause eye infections. With the pad of your finger gently rub the entire lens in a circular motion against the palm of your hand.

Be sure to thoroughly clean the entire lens and then rinse it well in a steady stream of biotrue. Carefully follow the instructions for the specific disinfection system you use. 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 Do not use out-of-date solution.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. This condition can lead to blurred vision or more serious complications.

RGP lenses allow oxygen to pass right through the lens. In addition, an RGP lens moves each time you blink, circulating oxygen-rich tears under the lens. Thanks to these two factors, the gas permeability of the lens and the movement of tears under the lens during linking-the cornea beneath an RGP lens can get all the oxygen it needs.

RGP lenses come in different designs and are made from different materials. There are many materials to choose from. In general, materials that allow more oxygen through the lens are more flexible but less durable than materials that allow less oxygen through the lens.

Having a broad range of materials and designs available allows your contact lens fitter to devise a lens that meets your precise needs. For example, if you must keep your lenses in for long periods of time, the fitter can pick a material that allows the highest amount of oxygen to pass through the lens. In other cases, a very thin lens could be made from a less oxygen permeable material; this lens would be very comfortable due to its thinness and very durable due to the material.

In addition, the lens surface can be treated to increase comfort. The variety of designs, materials, and surface treatments available for today's RGP lenses make successful wear possible for people who previously had difficulties with soft lenses or earlier rigid lenses. Because RGP lenses are custom made, they can be designed to fit your eye exactly. The fitter can make the lens larger or smaller, so that the lens will work perfectly with your eyelids. Also, the lens can be ground to precisely match the shape of your cornea.

RGP lenses are excellent for astigmatism. People with astigmatism have corneas that are not perfectly round. Many people with astigmatism are unsatisfied with the vision they get with soft lenses.

Because RGP lenses don't bend, they can give the cornea with astigmatism a more round shape, which provides crisp vision. RGP lenses are more durable and last longer than soft lenses. The hard surface of an RGP lens resists deposits better than a soft lens.

Its greater toughness makes RGP lenses better able to withstand the wear and tear of cleaning also. RGP lenses are also easy to handle. Unlike soft lenses, RGP lenses can usually be modified by your fitter. A soft lens that doesn't fit cannot be used. In many cases though, an RGP lens can be reworked to improve its fit. Your fitter can also adjust the RGP lens edge to improve comfort. Plus, RGP lenses can usually be polished by a professional to get them super-clean. None of this is possible with a soft lens.

RGP lenses take longer to get used to. Many beginning RGP lens wearers can feel the lens edge and find that feeling uncomfortable. Gas permeable lenses are custom-made to have a smooth surface and hold their shape on the eye. They also move on the eye with each blink, which allows tears to circulate underneath.

In contrast, soft contact lenses conform to the shape of the cornea, move around very little, and can dehydrate. It appears that reverse geometry corneal reshaping RGP lenses may not only help correct your vision now but also slow the progression of myopia over time.

These RGPs are used in orthokeratology, a treatment in which the patient wears lenses overnight to correct vision by reshaping the cornea. Related Post: Nearsighted or Farsighted?