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When Do I Need a Prescription?

November 11, 2025

If you’re squinting at your screen or wondering whether those drugstore readers are still cutting it… this post is for you.

We hear this question often:
“When do I actually need a prescription?”
Whether it’s for glasses or contact lenses, understanding when it’s time to get one can make a big difference in your comfort, safety, and long-term eye health.

If you’re unsure whether you need a prescription, it’s probably time to check in with your eye doctor. We recommend a comprehensive eye exam every year even if your vision seems fine. Eyes can change gradually, and you may not notice until discomfort creeps in.

️ You might need a prescription if:

  • You’re noticing blurred vision (near or far)

  • You’re getting frequent headaches or eye strain (especially after screen time)

  • You find yourself squinting more than usual

  • Night driving has become more difficult due to glare or halos

  • You’re using readers but still struggling to see clearly

  • Your contacts or glasses are over a year old

  • You simply haven’t had an exam in over a year (yes, really!)

What’s in a prescription, anyway?

A prescription for glasses or contacts isn’t one-size-fits-all. It includes detailed measurements tailored to your eyes like:

  • Sphere (how strong your lenses need to be, for near or far correction)

  • Astigmatism correction- if needed (a common eye condition that exists when the surface of the cornea or crystalline lens is irregularly shaped)

  • Pupillary distance

  • And more, depending on your vision needs (prism, add power, etc.)

Why it matters

Wearing the wrong strength (even if it’s “close enough”) can lead to:

  • Eye fatigue

  • Headaches

  • Dizziness

  • And in some cases, worsening of symptoms

For contact lenses, as another medical device, it is required to have a valid, up-to-date prescription. The fit, material, and shape need to be spot-on to keep your eyes healthy and prevent issues like irritation or infection.

Ready to see clearly again?

Schedule your eye exam today and let us help you find your perfect prescription and your perfect pair of frames.

Book an Appointment Now or call us at 828.254.6757