Do You Need a Prescription for Contacts? Your Complete Guide to Contact Lens Prescriptions

Yes, you need a valid prescription to buy contact lenses in Canada and the United States, with no exceptions. This requirement applies to all types of lenses, including cosmetic and coloured contacts.

If you have been wondering where to get a prescription, whether you can renew online, or what specific retailers actually require, you are asking the right questions. The rules governing contact lens prescriptions exist to protect your eye health, but they are often poorly explained or buried in legal fine print.

In this guide, we cover exactly how prescriptions work, where to get one (including online options for existing wearers), your legal rights as a consumer, and how to order contacts online with confidence. As a Canadian family-owned retailer, we help thousands of customers order contacts with valid prescriptions every week.

Why Contact Lenses Require a Prescription

It Is About Eye Health, Not Just Vision Correction

Contact lenses are classified as medical devices regulated by Health Canada and the U.S. Food and Drug Administration. Unlike glasses, which sit several centimetres from your eyes, contacts rest directly on your cornea. This direct contact means an improper fit can cause serious problems: infections, corneal abrasions, reduced oxygen flow to your eyes, and in severe cases, permanent vision loss.

A contact lens prescription contains measurements that glasses prescriptions simply do not include. Your eye care professional measures your cornea’s curvature (base curve), the lens diameter that fits your eye properly, and evaluates your tear film to determine which lens material will keep your eyes comfortable and healthy.

One point many people miss: even “plano” (non-corrective) coloured contacts require a prescription. You might have perfect 20/20 vision, but if you want to change your eye colour for a costume or everyday wear, you still need a professional fitting. Improperly fitted decorative lenses cause thousands of eye injuries every year.

Important: Even if you have 20/20 vision, you still need a prescription to buy coloured or costume contact lenses legally. Buying decorative lenses without a prescription puts your eyes at serious risk.

How to Get a Contact Lens Prescription

The path to getting a contact lens prescription depends entirely on whether you are a first-time wearer or an existing wearer looking to renew. This distinction matters because the options available to each group are quite different.

First-Time Contact Wearers: The In-Person Fitting

If you have never worn contact lenses before, you must visit an optometrist or ophthalmologist in person for a comprehensive eye exam and a contact lens fitting. No app, telehealth service, or online test can safely fit contacts for someone who has never worn them.

The fitting process involves several steps. Your eye care professional will conduct a complete eye health examination, checking for conditions that might affect contact lens wear. They will perform a refraction test to determine your prescription strength, measure your cornea’s curvature, evaluate your tear production, and assess which lens type suits your specific eyes.

Most first-time fittings include trial lenses. You will wear these for a week or two, then return for a follow-up visit where your doctor confirms the fit, checks for any problems, and finalises your prescription. Costs vary by province or state and whether you have vision insurance, but expect to pay between $75 and $150 for the fitting portion, on top of your standard eye exam fee.

For a detailed walkthrough of this process, check out our complete first-time user’s guide on how to get contacts.

Existing Wearers: Renewing Your Prescription

If you already wear soft contact lenses successfully, you may be eligible to renew your prescription online without visiting an office in person. Online renewal services use telehealth platforms to conduct visual acuity tests via smartphone apps, and they can be a convenient option for wearers with stable prescriptions.

However, online renewals have important limitations. They are designed for soft contact lenses only. If you wear specialty lenses such as rigid gas-permeable (RGP), scleral, or ortho-k lenses, you need an in-person examination. Online renewals are also not appropriate if you have eye health conditions or an unstable prescription.

Am I Eligible for Online Prescription Renewal?

• Currently wear soft contact lenses
• Age 18 to 55
• No eye disease, diabetes, or high blood pressure affecting your eyes
• Prescription stable for at least one year
• No recent eye surgeries or injuries

If all of the above apply to you, online renewal may be a convenient option. For more details on exam timing and requirements, read our guide on how often you need an eye exam for contact lenses.

Your Legal Rights: The Fairness to Contact Lens Consumers Act

Many contact lens wearers do not realise they have significant legal protections when it comes to their prescriptions. The Fairness to Contact Lens Consumers Act (2003) in the United States, along with similar regulations in Canada, established clear rules that protect your right to shop wherever you choose.

Under these regulations, prescribers are required to automatically provide you with your prescription after a fitting, free of charge, even if you do not specifically ask for it. You have the legal right to take that prescription anywhere: your eye doctor’s office, a retail store, or an online retailer like Contacts For Less.

The Federal Trade Commission actively enforces these rules. If your eye care provider refuses to give you your prescription or charges you for it, they may be breaking federal law.

Prescription expiration varies by location. The federal minimum in the United States is one year, but some states allow prescriptions to remain valid for two years. In Canada, prescription validity depends on your province and your eye care professional’s clinical judgment. Always check your specific expiration date before ordering.

Your prescription belongs to you. If your eye care provider refuses to release it, they may be violating federal regulations. You have the right to buy contacts from any authorised seller.

How Online Contact Lens Ordering Works

The Prescription Verification Process

When you order contact lenses online from any reputable retailer, including Contacts For Less, the retailer must verify your prescription before shipping your order. At checkout, you provide your prescriber’s name and contact information. The retailer then contacts your eye doctor to confirm your prescription is valid and matches what you have ordered. This verification typically occurs in the background, requiring no action on your part beyond providing accurate information.

One consumer protection many people are not aware of: the 8-hour-business rule. If your prescriber does not respond to the verification request within 8 business hours, the retailer can legally fulfill your order through passive verification. This rule exists specifically to prevent prescribers from blocking or delaying orders to competing retailers. Your eye doctor cannot hold your prescription hostage.

What You Need to Order

Before placing an order, gather your prescription information. You will need the following:

Contact lens prescriptions are brand-specific. You cannot substitute one brand for another without a new prescription, even if the power and measurements appear similar. Different brands use different materials and designs that interact with your eyes in different ways.

If you are unsure what is on your prescription or need help understanding the numbers, our guide to ordering contact lenses online walks you through every step.

Where Can You Buy Contacts? Retailer-Specific Answers

Different retailers have different processes, but they all share one requirement: a valid prescription.

Do You Need a Prescription for 1-800 Contacts?

Yes. 1-800 Contacts requires a valid prescription for every order without exception. They offer a prescription verification service that contacts your doctor on your behalf and provides online prescription renewal services for eligible existing wearers through their app.

Do You Need a Prescription for Contacts at Walmart?

Yes. Both Walmart Vision Centre locations and Walmart.com require valid prescriptions for all contact lens purchases. You can get a contact lens exam at Walmart Vision Centres, where independent optometrists operate inside the stores. If you order online through Walmart, your order goes through the same verification process as other retailers.

Can You Buy Contacts at CVS in-store?

No. CVS does not sell contact lenses in its physical retail stores. CVS sells contacts online only through CVS.com, and a valid prescription is still required for all purchases.

Does Bailey Nelson Carry Contact Lenses?

Yes. Bailey Nelson sells contact lenses in Canada and Australia, carrying major brands like Acuvue and Dailies, as well as its own BN-branded lenses. A valid prescription is required for all purchases, and availability varies by location.

Special Cases: Astigmatism, Keratoconus, and Specialty Lenses

Can I Wear Contacts with Astigmatism?

Absolutely. Toric lenses are specifically designed to correct astigmatism and are available from every major manufacturer in daily, biweekly, and monthly replacement schedules. Options include Acuvue Oasys for Astigmatism, Air Optix for Astigmatism, and Biofinity Toric, among many others.

Toric prescriptions include two additional measurements beyond standard lenses: cylinder (the amount of astigmatism correction) and axis (the angle of correction). These parameters must match your prescription exactly for the lenses to work properly. For a full breakdown of your options, see our guide to the best contact lenses for astigmatism.

Are Glasses or Contacts Better for Keratoconus?

For keratoconus, specialty contact lenses generally provide far better vision than glasses. Keratoconus creates an irregular corneal surface that glasses cannot fully correct. Scleral and rigid gas-permeable (RGP) lenses vault over the irregular cornea, creating a smooth optical surface filled with artificial tears, which can allow many keratoconus patients to achieve significantly improved vision compared to glasses alone.

These specialty lenses require in-person fitting by an eye care professional experienced with keratoconus. Online prescription renewals do not apply to RGP or scleral lenses, and individual results vary based on the severity and shape of the condition. Consult with a specialist for personalised recommendations.

Common Pitfalls to Avoid

Using an expired prescription. Your eyes change over time, and wearing lenses based on outdated measurements can cause discomfort, poor vision, or eye health problems. Always verify your prescription is current before ordering.

Assuming cosmetic lenses do not need a prescription. Every contact lens, including coloured and costume lenses, requires a valid prescription by law. This is one of the most common and most dangerous misconceptions.

Ordering the wrong brand or parameters. Contact lens prescriptions are brand-specific. You cannot substitute one brand for another without getting a new prescription, even if the power numbers look similar.

Skipping follow-up appointments. First-time wearers, in particular, need follow-up visits to confirm fit and comfort. Skipping these means missing potential problems before they become serious.

Buying from unverified overseas sellers. Stick to authorised retailers to ensure you are getting genuine lenses stored and shipped properly. Counterfeit and improperly stored lenses are a real risk.

Not knowing your rights. If a prescriber charges you for your prescription or refuses to release it, they may be violating federal regulations. You have the right to your prescription and the right to shop anywhere.

Warning: Buying costume contacts at a flea market or Halloween store without a prescription is illegal and dangerous. These unregulated products cause serious eye injuries every year.

Quick Reference: Contact Lens Prescription Checklist

Before Your Eye Exam:

• Bring your current glasses and/or contact lens boxes
• Know your medical history (diabetes, dry eye, allergies)
• List any vision problems or comfort issues you have experienced

After Your Exam:

• Request a copy of your prescription (it is your legal right)
• Confirm the prescription includes: brand, power, base curve, diameter
• Note the expiration date

Before Ordering Online:

• Verify your prescription has not expired
• Have your prescriber’s name and phone number ready
• Double-check all lens parameters match your prescription exactly

Key Takeaways

Yes, you need a valid prescription for all contact lenses. No exceptions. This includes coloured and cosmetic lenses.

Two pathways exist depending on your situation. First-time wearers must have an in-person fitting. Existing wearers with stable prescriptions may qualify for online renewal.

Your prescription belongs to you. Prescribers are legally required to release it automatically and free of charge. You can shop anywhere you choose.

The 8-hour rule protects you. If your prescriber does not respond to verification requests within that window, online retailers can fulfill your order through passive verification.

Ordering online is straightforward with a valid prescription. Most orders ship quickly once verification is complete.

At Contacts For Less, we make ordering contacts as simple as possible. As a 100% Canadian family-owned company, we offer competitive pricing, free shipping, and customer service from our team in Surrey, BC. We also donate a portion of every sale to the charity you choose, so your purchase supports more than just your vision.

Ready to order? Browse our full selection of contact lenses from Acuvue, Alcon, CooperVision, and Bausch and Lomb.