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Not everyone is able to adjust to or tolerate monovision. It's best to do a trial with contact lenses before having a permanent surgical procedure. This is usually not an issue, but know that you'll have to completely stop wearing your contact lenses and switch to glasses for at least a few weeks before your surgery. Contact lenses distort the natural shape of your cornea, which can lead to inaccurate measurements and a less than optimal surgical outcome.
Your doctor will provide specific guidelines depending on your situation and how long you've been a contact lens wearer. Most people who undergo LASIK surgery will have good to excellent vision in most situations, for many years or decades. You'll be able to play sports and swim, or even just see the clock first thing in the morning, without having to worry about your glasses or contact lenses. But as you get older or in low-light conditions, you may still need to wear glasses.
But long-term results often aren't available or haven't been well studied. Part of the reason for this is that people are overall satisfied after surgery, so they don't feel a need for repeat examinations and follow-up data is not collected. Also, the LASIK procedure has been refined over time — the techniques and technology is continually changing. This makes it difficult to draw conclusions from the data that is reported.
Keep in mind that even when postoperative follow-up is done and reported, vision is measured under optimal testing conditions. Your vision in dim light such as at dusk or in fog may not be as good as published reports suggest it will be. Over time, your refraction may slowly worsen with age and your vision may not be quite as good as it was immediately after surgery. This does not seem to be a large problem, but the exact degree of change to be expected is sometimes unpredictable.
A good starting point when choosing an eye surgeon is to talk with the eye professional you know and trust. Your eye surgeon will probably work with a team, who may help with your initial evaluation and measurements. But it is your surgeon who takes the ultimate responsibility for determining whether LASIK is an appropriate choice for you, who confirms the measurements to guide the procedure, who performs the procedure and who provides postoperative care.
He or she can help you understand the benefits and limitations of surgery. Carefully consider the factors outlined here, weigh your preferences and risk tolerance, and make sure you have realistic expectations. Talk to an eye surgeon in whom you feel confident and get your questions answered. In the end, if it feels right, then proceed, but if it doesn't, don't rush into anything. There is a problem with information submitted for this request. Sign up for free, and stay up-to-date on research advancements, health tips and current health topics, like COVID, plus expert advice on managing your health.
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You may opt-out of e-mail communications at any time by clicking on the Unsubscribe link in the e-mail. Our Housecall e-newsletter will keep you up-to-date on the latest health information. Mayo Clinic does not endorse companies or products. Also, anti-reflective coating is highly recommended for lenses that correct nearsightedness. AR coating eliminates distracting reflections in the lenses, making them appear thinner and more attractive. Eliminating reflections also improves vision and comfort.
Ortho-k contact lenses are another choice for the correction of nearsightedness. These are specially designed rigid gas permeable GP contact lenses that not only correct existing myopia — they may actually help control myopia progression in children. Finally, people with moderate to severe myopia may benefit from implantable lenses. Known as phakic IOLs , these tiny lenses work like contact lenses but are implanted surgically within the eye, directly behind the pupil.
It is not possible for me to tell you what intraocular lens IOL combination would work best for you, as this is a very personal decision. There are three basic ranges of vision: distance, intermediate and near. As it stands today, many intraocular lenses can provide excellent vision is any two of these three ranges, but none of the available intraocular lens provides excellent vision in all three ranges.
There are many ways of using multifocal and monofocal lenses to deal with this problem:. Ask a New Question. Not every question will receive a direct response from an ophthalmologist.
However, we will follow up with suggested ways to find appropriate information related to your question. Medical disclaimer. By submitting your question, you agree to be answered by email. This causes light to focus beyond your retina instead of on it. You're more likely to be farsighted if your parents are. This number is used to identify how strong your lenses need to be to correct your vision.
If the number has a minus - sign next to it, it means you're nearsighted. A higher number means that you have a more severe astigmatism. Currently, there is no cure for nearsightedness. But there are proven methods that can be prescribed by an eye doctor to slow the progression of myopia during childhood.
But corrective lenses only work while a person is wearing them and they are not a cure. Nearsightedness can be corrected with eyeglasses , contact lenses or refractive surgery. Depending on the degree of your myopia , you may need to wear your glasses or contact lenses all the time or only when you need very clear distance vision, like when driving, seeing a chalkboard or watching a movie.
The human eye, camera, telescope, microscope etc. Lights, flashlights, laser, binocular etc. If you are farsighted , your eye does not have adequate focusing power — light rays fail to form a focus point by the time they reach the retina. Contact lenses and glasses correct farsightedness by converging light rays, which increases the eye's focusing power. Minus cylinder is ground on the back of the lens.
Plus cylinder is ground on the front of the lens. The optical effects are different. This is not done anymore as almost all cylinder is ground on the back due to the bifocals of today are almost all on the front. The far point of myopic eye is 70 cm.
Convex lenses are used in things like telescopes and binoculars to bring distant light rays to a focus in your eyes.
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