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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.

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To show Canadians there's so much more to see, we're giving away a $10,000 getaway anywhere in Canada. One lucky winner will plan their dream vacation with flights, 5-star stays, unforgettable experiences, and a KITS shopping spree.
Every purchase made on Kits.com by October 31 will automatically receive 100 entries. For more ways to win, be sure to check us out on Instagram @kitseyecare.
Giveaway ends October 31, 2025 at 11:59 PM PT. Open to Canadian residents 18+. Prize details and inclusions are set by KITS and may be changed, substituted, or cancelled at any time. No cash value. No purchase necessary. Free entries available on Instagram.

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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
 4.1 stars

Premium contacts. Priced for real life.

30-day risk-free trial & free shipping included.
Start fresh, every day
Designed to breathe
High DK/t oxygen transmission keeps eyes white, clear, and comfortable. Even after 12 hours of wear.
Premium lens technology
KITS Daily uses third-generation silicone hydrogel. The same material trusted by the top brands, without the premium price tag.
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No routine required
Daily disposables mean zero cleaning and a fresh lens every time.
FDA approved
Every lens has been reviewed, tested, and approved to meet FDA requirements.
Try risk-free for 30 days
Wear them, then decide. If these aren't the most comfortable lens you've ever tried, we'll refund you completely.
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4.1 Stars
Trusted and loved by real wearers
@00enola
Highly breathable
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@roselinmiller
All day comfort
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Active days
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"Just as good, if not better, than my much higher priced dailies. I've been wearing expensive brands for years. Glad I took the chance."
Marcus
"Always bought the expensive brands, this exceeded my expectations. Almost identical quality at a fraction of the price."
Priya
"High end for value price, ships very fast. My new go-to contacts."
Jordan
"So comfy for all day wear. I've been ordering for over 2 years. These lenses are the best. Great price and the comfort is next to none."
Sarah
"These contact lenses are so comfortable that you may forget you're wearing them. This is my third purchase of this product, and I have consistently experienced excellent results."
Elena
"The lenses are very comfortable. I like being able to put in a fresh pair whenever I feel like it. At first I was hesitant to try online shopping for contacts. The ordering experience and the lenses themselves were perfect."
Katie
"You really don't feel them in your eyes. I've tried four other brands before and honestly these are the ones I felt the least. They don't dry out your eyes at all. They feel as if you're not wearing anything."
Nadia
"My young athlete loves her new KITS contacts. Affordable, quick delivery and the best customer service ever. She finds them easier to use than brand name contacts she has trialed at the optometrist."
Sunny
"More comfortable than my usual brand name contacts at a fraction of the price. Love these contacts. Perfect for everyday wear."
Lisa
Why KITS Daily?
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Q&A
Are these FDA approved? Collapse Icon

Absolutely! KITS Daily contacts are FDA approved so you can be confident that they meet the highest safety and quality standards.

Silicone hydrogel is a special material that allows more oxygen to reach your eyes than regular hydrogel lenses. This helps keep your eyes healthy, refreshed, and comfortable throughout the day.

KITS Daily contacts are designed for single-use, meaning you get a fresh, clean lens every day. This is super convenient and hygienic, as you don't have to worry about cleaning or storing your lenses. Just pop in a new pair each morning and you're good to go!

Not yet, but stay tuned! We're always working on expanding our product line to meet the needs of all our customers.

While we don't have trial packs available, we do offer a 30-day risk-free trial on all our contact lenses. If you're not completely happy with your KITS Daily contacts, simply return them and we'll help you find a better option. Your eye health and comfort are our top priorities!

Yes, you need a prescription for KITS Daily contacts from your optometrist.