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How to read your glasses prescription

How to enter your glasses prescription

OD is an abbreviation for the Latin term oculus dexter which means right eye. Notice that the right eye information is asked for first even though we typically read from left to right.

OS is an abbreviation of the Latin oculus sinister which means left eye. That will be referenced on the far right column of the prescription.

SPH is short for sphere. The sphere of your prescription indicates the power on the lenses that is needed to see clearly. A plus (+) symbol indicates the eyeglass wearer is farsighted. A minus (-) symbol indicates that the eyeglass wearer is nearsighted.

CYL is short for cylinder. The cylinder indicates the lens power necessary to correct astigmatism. If the column has no value (is blank), it indicates that the eyeglass wearer does not have astigmatism. If this is the case on your prescription, you can leave it blank when entering it in.

AXIS is a prescription will include an axis value for those with astigmatism. This number represents the angle of the lens that shouldn't feature a cylinder power to help correct your astigmatism.

ADD is short for "additional correction." This is where details about bifocals, multifocal lenses or progressive lenses would appear.

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How to read your contacts prescription

How to enter your contacts prescription

OD is an abbreviation for the Latin term oculus dexter which means right eye. Notice that the right eye information is asked for first even though we typically read from left to right.

OS is an abbreviation of the Latin oculus sinister which means left eye. That will be referenced on the far right column of the prescription.

B.C. is short for base curve measurement indicates the back curvature of your contact lens, in millimetres. This is important for comfort, as the BC of your contact lenses should match your eye's natural curve as closely as possible to ensure a better fit when you are wearing your contact lenses.

DIA is short for "diameter," or the distance from one edge of the contact lens to the other. This is measured in millimeters.

SPH is short for sphere. The sphere of your prescription indicates the power on the lenses that is needed to see clearly. A plus (+) symbol indicates the eyeglass wearer is farsighted. A minus (-) symbol indicates that the eyeglass wearer is nearsighted.

CYL is short for cylinder. The cylinder indicates the lens power necessary to correct astigmatism. If the column has no value (is blank), it indicates that the eyeglass wearer does not have astigmatism. If this is the case on your prescription, you can leave it blank when entering it in.

AXIS is a prescription will include an axis value for those with astigmatism. This number represents the angle of the lens that shouldn't feature a cylinder power to help correct your astigmatism.

ADD is short for "additional correction." This is where details about bifocals, multifocal lenses or progressive lenses would appear.

% OFF* YOUR FIRST CONTACTS ORDER!
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*Discount applied on the current website price at the time of order. Offer only valid for new customer first contacts order over $10. Maximum discount of $100. Cannot be combined with any other offers. Promotions are subject to change without notice. We reserve the right to cancel orders that are in breach of the terms and conditions of this offer.

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Unfortunately, we can't offer direct billing on Autoship orders just yet, but we're actively working on it! In the meantime, here's what you can do:
  • To keep Autoship: Place your order as usual and submit a claim to your insurance provider afterward.
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Save 15%
Increased savings
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On every order
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on all future orders
Loyalty Rewards
Top tier savings & perks with each reorder
Measurements
If you already have a pair of glasses, you can compare the measurements to your current frame. Just look inside your temple to find your frame measurements. The overall frame size is a combination of lens and bridge's width measurements.
Lens Width Bridge Width Temple Length
XS < 42 mm < 16 mm <=128 mm
S 42 mm - 48 mm 16 mm - 17 mm 128 mm - 134 mm
M 49 mm - 52 mm 18 mm - 19 mm 135 mm - 141 mm
L >52 mm >19 mm >= 141 mm
Canada-exclusive
Get Your First Pair Free
Why? Because Canadians take care of their own. We're so confident you'll love our glasses that we're giving away 500 pairs every day - so enjoy your first pair of KITS for free and see the Canadian difference for yourself.
Use code: FIRSTPAIRFREE
See FAQs for more details
First pair of glasses free - exclusive for Canadians!

Looking for affordable, high-quality prescription glasses online in Canada? At KITS, we're giving away 500 free pairs of glasses every day! This exclusive First Pair Free offer resets daily, so you have a new chance to claim yours - just cover shipping. No hidden fees, just premium, handcrafted eyewear designed and shipped from Canada. Don't miss out, shop now and see the Canadian difference!

FAQs
What is the First Pair Free offer? Collapse Icon
We're offering new customers their first pair of glasses for free-including frames and standard prescription lenses! It's our way of welcoming you to KITS and making premium eyewear accessible to more Canadians.
As a proudly Canadian company, we believe everyone deserves access to affordable, high-quality eyewear. This initiative helps introduce KITS to new customers while supporting our mission to make eyecare easy.
By choosing KITS, you're supporting a homegrown Canadian company. We operate locally, create jobs within Canada, and work with Canadian partners wherever possible. Your support helps strengthen the Canadian economy and keeps business thriving in our communities.
Yes! Our glasses are designed, assembled, and shipped from our optical lab in Vancouver, BC. We pride ourselves on our quality - Canadian craftsmanship, fast shipping, and personalized service - all from right here in Canada.
This offer is available to all new KITS customers in Canada. If you've never ordered glasses from us before, this is your chance to experience KITS quality and Canadian craftsmanship at no cost.
All you need is your valid prescription and to cover the shipping cost. Just use code FIRSTPAIRFREE at checkout to get your first pair free!
The First Pair Free promotional code is for new KITS customers in Canada and is valid on any KITS frame up to $38 with standard prescription lenses. This means you can choose from hundreds of our stylish frame options, including many of our best sellers and even of our newest collections!

Our standard 1.50 index prescription lenses are always free, so just pick your frames, apply the promotional code, and pay for shipping. Sunglasses are excluded.
No catch, just great Canadian glasses! You'll only need to cover shipping. The First Pair Free promotional code grants you up to $38 off your first pair of KITS glasses. If you opt for additional lens upgrades (e.g., our advanced ultra-thin lenses or blue light protection), you'll only have to pay the difference! We always offer our standard 1.50 index prescription lenses for free, so you can choose from any KITS frame up to $38 and enjoy your first pair of KITS for free.
No, this offer excludes designer eyewear, sunglasses, accessories, and contact lenses. The First Pair Free promotion is designed for you to experience the premium quality of KITS prescription glasses, made in Canada, by Canadians. It's about showcasing our local craftsmanship and commitment to quality that we know you'll love! You can pick from any KITS frame up to $38, complete with our standard 1.50 prescription lenses.
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