How to take a vision test on your phone

Remember the good old days when a vision test meant awkwardly sitting in a chair, covering one eye, and trying to pick out tiny letters on a wall chart while an eye care professional clucked disapprovingly at your mistakes? (No? Just us? Fine.) 

Good news: it’s the 21st century. You can now take a vision test on your phone and, in many cases, renew your contact lens prescription online — no waiting room required.

Why take an online vision test?

• Takes minutes

• Reviewed by licensed doctors

• Get results fast

• Order contacts immediately

But how does an online vision exam actually work? And is it legit?

Let’s break it down.

What Is an Online Vision Test?

An online vision test... sometimes called an “eye exam on your phone”), is a digital exam you complete using your smartphone or computer to evaluate your visual acuity.

Important distinction:

These tests are not comprehensive eye health exams. They don’t check for eye diseases or replace in-person medical evaluations.

Instead, they’re typically used to:

• Renew an existing contact lens prescription

• Confirm your current prescription still works

• Check visual acuity (how clearly you see)

Some apps are novelty tools (like color blindness tests). Others, like ExpressExam from 1-800 Contacts, are designed to help eligible customers renew their contact lens prescriptions under the review of a licensed eye doctor.

How Do Phone Vision Tests Work?

Online eye exams use calibrated digital tools to measure visual acuity.

Here’s what’s happening behind the scenes:

• The test displays letters or symbols at a specific size based on how far you are from your phone.
• You may be asked to cover one eye at a time.
• You’ll answer questions about visual clarity and comfort.
• You’ll take photos of your eyes to submit for review.
• Your results are securely sent to a licensed eye doctor in your state.

Most exams are asynchronous — meaning you don’t need to be on a live video call. You can complete the test on your own time.

How to Renew Your Contact Lens Prescription Online

If your contact lens prescription is expired (or about to be), here’s how to renew it with an online vision test.

Step 1: Choose a Reputable Provider

Look for a state-compliant service reviewed by licensed eye doctors.

With ExpressExam from 1-800 Contacts, board-certified ophthalmologists licensed in your state review your results to determine if your prescription can be safely renewed.

Step 2: Set Up Your Environment

• Use a well-lit room

• Adjust your screen brightness as instructed

• Stand the recommended distance from your phone

• Have your current contacts or glasses available

Step 3: Complete the Guided Vision Test

You may be asked to:

• Cover one eye at a time
• Read letters, numbers, or shapes
• Answer questions about comfort and clarity
• Take photos of your eyes

The exam verifies whether your existing prescription still works for you.

Step 4: Doctor Review

Your results are securely sent to a licensed eye doctor for evaluation.

If approved, your renewed prescription is typically delivered within hours. With ExpressExam, most customers receive their updated Rx within two business hours.

Step 5: Order Your Contacts

Once your prescription is renewed, you can order your contacts online for home delivery — easy.

Tips for a smooth online vision test

• Make sure your prescription is eligible: Online vision exams are typically best for renewing an existing prescription if your vision hasn’t changed drastically and you’re not experiencing new eye health issues.

• Check your state’s rules: Prescription expiration dates vary by state (most are valid for 1–2 years), so double-check your state’s requirements or ask the provider if you’re unsure.

• Contact support if you have questions: If anything is unclear during the process, good online providers have support teams ready to help.

What states allow online eye exams?

Online vision exams for contact lens prescription renewal are permitted in many U.S. states, including:

• Alabama

• Alaska

• Arizona

• Arkansas

• California

• Colorado

• Connecticut

• Florida

• Georgia

• Idaho

• Illinois

• Indiana

• Iowa

• Kentucky

• Maine

• Maryland

• Massachusetts

• Minnesota

• Mississippi

• Missouri

• Montana

• Nebraska

• Nevada

• New Hampshire

• New York

• North Carolina

• North Dakota

• Ohio

• Oklahoma

• Oregon

• Pennsylvania

• Rhode Island

• Tennessee

• Texas

• Utah

• Vermont

• Virginia

• Washington

• Washington D.C.

• Wisconsin

• Wyoming

Note that state laws do change fairly regularly. You may need to check whether you can do an online vision test depending on where you live. At 1-800 Contacts, we'll get your state location as part of the screening process to help you understand if you're eligible.

Are Online Vision Tests Accurate?

Short answer: Yes, for what they’re designed to do.

Online vision tests are generally accurate for confirming whether your current prescription still provides adequate vision correction.

However, they are not a replacement for comprehensive eye health exams.

They do not:

• Diagnose eye diseases

• Replace in-person exams for first-time contact lens wearers

• Address new or worsening vision problems

Think of them as a convenient renewal option — not a full medical evaluation. If you're wondering how often you should go to the eye doctor, check out this article.

Comparing phone tests to traditional exams 

Phone vision tests are surprisingly accurate, but they're not a substitute for comprehensive eye health exams. The main benefit of phone tests is convenience. They’re great for quick checks and monitoring changes in your vision, not for determining eye health or prescribing contact lenses for the first time.

When Should You Use a Phone Vision Test?

An online eye exam is typically appropriate if:

• You already wear contacts

• Your vision feels stable

• You aren’t experiencing new symptoms (pain, flashes, sudden changes)

• You simply need to renew your prescription

If you have eye health concerns, schedule a comprehensive exam with an eye care professional.

Why Renew Your Prescription Online?

Renewing your contact lens prescription online can:

• Save time

• Skip the commute

• Help you avoid prescription lapses

• Keep your vision correction current

With 1-800 Contacts, your exam is reviewed by a licensed professional, and you can order contacts immediately after approval. No office visit required.

How Fast Can You Renew Your Contacts Online?

If your prescription is eligible, many online vision tests provide same-day review.

With ExpressExam, most customers receive their updated prescription within two business hours after completing the test.

That means you can:

• Take the exam on your lunch break

• Get approved the same day

• Order contacts immediately

No waiting weeks for an appointment.

Is an Online Vision Test Cheaper Than an In-Person Exam?

Online vision tests are typically more affordable than full in-office eye exams because they focus only on prescription renewal.

However, they’re not a substitute for comprehensive eye health evaluations. If you’re due for a full exam or have new symptoms, an in-person visit is the safest choice.

FAQs 

Can online vision tests detect eye diseases?

No. Online vision tests check visual acuity only. They do not diagnose eye conditions. If you’re concerned about eye health, see an eye doctor in person.

Are online vision tests free?

Some apps offer free screenings, but prescription renewal exams may have a fee.

Can my eye doctor give me my contact lens prescription over the phone?

Yes. Federal law requires providers to give you a copy of your contact lens prescription after your exam — and to provide it again upon request, whether in person, by phone, or electronically.

Original publish date: 8/1/2024

Updated date: 2/19/2026