is my prescription the same for glasses and contacts?
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A glasses prescription is not the same as a contact lens prescription. Glasses sit slightly away from your eyes and contact lenses sit directly over your eye, so two different tests and measurements are required.
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If you wear or want contacts, you need a contact lens exam in addition to a comprehensive eye exam. ... An eyeglass prescription measures for lenses that are positioned approximately 12 millimeters from your eyes; whereas a contact lens prescription measures for lenses that sit directly on the surface the eye.
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Eyeglasses can bend the light to the proper place within the eyes and therefore improve the images that you see. A prescription is needed for glasses because the curvature of the lenses has a mathematical basis. ... A vision exam will measure the precise correction that your eyes need for vision to be improved.
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Aviator sunglasses, like all types of eyewear, are available with a prescription. ... The mirrored lenses common on aviator sunglasses can also hide any visual distortions on your face caused by stronger prescriptions.
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Contact lenses need to be fit to each individual's eyes. There isn't a one-size-fits-all lens. Each lens can act differently. Even if it fits on the eye initially, it may change once the lens dries out a little bit or once it's been worn for a few hours.
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Colored contacts are a fast growing segment of the contact lens market. ... All color contact lenses require a prescription but even if you don't need vision correction, ask your doctor about 0.00, or plano contacts, so you can get the benefit of changing your eye color without the corrective prescription.
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Over the counter reading glasses offer the same prescription in both lenses even though most people have one eye that is stronger than the other. In contrast, eye glasses purchased through your eye doctor can be customized to fit the prescription your eyes need.
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Bifocal contact lenses generally have two prescriptions (or 'powers') in the same lens. The two prescriptions are used to correct near vision and distance vision. ... When choosing bifocal or multifocal contact lenses, you'll usually have two options: simultaneous vision lenses or alternating vision lenses.
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Your pupillary distance measurement is key to ordering eyeglasses online, but getting it can be a battle — and it shouldn't be. ... Lots of optometrists will give you a copy of your prescription but not include your PD.
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The first time you wear a new pair of prescription glasses, your eyes need some time to adapt to them. The first day you can wear them for four hours and you can add two hours per day gradually. The second day you can wear them for six hours, and the third day for eight hours until you get used to it.
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Contacts meant for daily or one-time use can generally be worn up to 14 to 16 hours with no problem, but your doctor may recommend a contact-free hour or two before bedtime in order to rest your eyes. Contacts designed for continual use can be worn overnight, but, again, be sure to follow your doctor's instructions.
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Contact lens and glasses prescriptions are not the same. ... Also, glasses rest about 12 millimeters from your eyes, while contacts sit directly on the eye. Contact lenses made to conform to a glasses prescription would be stronger than necessary, which could cause vision problems.
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No there is not a big diff between the two base curves. However, it's the relationship between diameter and base curve that is more important. Also, the material of the lens can also affect the fit. You can have 3 diff contact lenses with the same BC, Diameter and power and they will all fit differently.
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Prescription glasses for long-sightedness are convex, known as plus lenses, which 'fix' the light coming into the eye by bending the light rays slightly inwards, meaning they end up where they should on the retina. The particular prescription will vary from person to person as the extent of hypermetropia varies.
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Both optometrists and ophthalmologists examine eyes and prescribe eyeglasses and contact lenses. ... With a few exceptions, optometrists in the U.S. are not trained or licensed to perform eye surgery.
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Usually, your VSP plan will give you an allowance for frames for eyeglasses and contact lenses. ... If you opt for contact lenses, you may not be able to use VSP benefits for discounts on eyeglass frames as well. VSP offers a complete eye exam called the VSP WellVision Exam that must be performed by a VSP provider.
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Contact lens and glasses prescriptions are not the same. ... Contact lenses made to conform to a glasses prescription would be stronger than necessary, which could cause vision problems. Finally, your glasses are shaped to correct for astigmatism (irregular curve in the cornea or lens).