How to Read My Contact Lens Prescription
Your contact lens prescription allows you to purchase contact lenses that match your requirements from opticians or online suppliers. You should e'er be given a prescription later on a successful contact lens fitting. If you lot didn't receive one, in the Britain it's your legal right to have a copy, so simply reach out to your optician and inquire.
Do I need a prescription for contact lenses in the United kingdom of great britain and northern ireland?
When it comes to correcting your eyesight, the answer is 'yep', you lot exercise need a prescription for contact lenses in the United kingdom of great britain and northern ireland like you do for eyeglasses, as well as regular visits to your optometrist to check up on your eye wellness. However, fifty-fifty though yous technically don't demand a prescription to buy coloured contact lenses, our optical counselor recommends that an center exam will help you to cull the about suitable ones.
Ordering contact lenses from us is super-easy, as we don't demand to verify your physical prescription. Having a valid prescription is apparently essential, only nosotros trust you lot to have your eye wellness into your own hands. If yous would like usa to verify information technology, nosotros're happy to do that too.
Reading your contact lens prescription
For new contact lens wearers, this video will be peculiarly handy in helping you to acquire how to read your prescription correctly.
How practise I read my prescription?
You can discover your prescription on the piece of paper given to you past your optician during a check-up, on the end/side of your contact lens box or on the blister packs that incorporate your contact lenses.
A written prescription ordinarily includes the post-obit specifications: base bend, bore, ability (or sphere), and and then additional figures for Cylinder and Centrality if you accept astigmatism, and Addition and Dominant figures for presbyopia correction. The prescription for your left and right heart will be listed separately every bit they may vary.
Example prescription:
| Base Curve | Diameter | Ability/Sphere | Cylinder | Centrality | Improver | Dominant | |
|---|---|---|---|---|---|---|---|
| Left | viii.4 | 14.0 | -0.l | -1.25 | 10 | >+one.0 | N |
| Right | viii.4 | 14.0 | -1.25 | -1.25 | 10 | +1.0 | D |
Name & death engagement: Your prescription should also contain the proper name of your contact lens brand (east.grand. Acuvue Oasys) and an expiry date, which is ordinarily a yr from the date of your bank check-up.
Below is an example of the prescription listed on the side of the box for 1-Twenty-four hour period Acuvue Moist for Astigmatism.
Please exist aware that a contact lens prescription is different from a glasses prescription, so yous cannot use one for the other.
What does each prescription effigy mean?
Base Curve (BC): The base of operations bend determines what type of fit is required for the lens to run into the curve of your middle; this is ordinarily written in millimeters or sometimes with the words: flat, median or steep.
Diameter (DIA): The bore of the contact lens is likewise written in millimetres and determines the width that best fits your heart.
Power/Sphere (PWR/SPH): This figure shows whether you're long or short-sighted and how much correction your eyes crave. If y'all have long-sightedness (hyperopia) your figure will brainstorm with a + (plus sign) and if you have short-sightedness (myopia), it will brainstorm with a - (minus sign). This will be followed by a number that goes upwards from 0 in measures of 0.25 dioptres, the higher the number the stronger the visual correction needed (this value can be displayed on the box as "PWR" or "D").
Prescription Figures for Astigmatism
The below figures are simply displayed on contact lens prescriptions where there is a need for astigmatism correction, and yous require toric lenses.
Cylinder (CYL): The cylinder volition always be a minus number that increases in measures of 0.25. Much like the ability/sphere effigy that is shown on all standard prescriptions, the cylinder for toric lenses denotes the extra visual requirements needed for astigmatism and how severe the astigmatism is.
Centrality (AX): Astigmatism is acquired by the irregular curvature of the eye; the axis is a figure which determines the angle of the correction needed in order to see clearly. The Axis is always a number between 0 and 180 degrees.
Prescription Figures for Presbyopia
The below figures are only displayed on contact lens prescriptions where there is a need for presbyopia/multifocal correction.
Add-on (ADD): If you suffer from presbyopia it affects your near vision, the Addition effigy determines what level of correction y'all need to be able to see conspicuously at a close distance. This is a number betwixt 0.50 and 3.00, some contact lens brands refer to this as a loftier, medium or low.
Dominant: Multifocal or bifocal contact lens wearers will see that the correction is determined past a dominant and non-dominant eye. This is the ascendant figure, and is usually marked with a "D" and "Due north" to express which eye is which.
Source: https://www.visiondirect.co.uk/eye-care-centre/understanding-your-contact-lens-prescription
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