What Online Glasses Often Get Wrong

February 11, 2026

Buying glasses online may seem like a fast and cheap option, but there are risks. Here are the most common problems encountered by those who opt to purchase glasses online.


Fit

Person adjusting glasses on right, and another on left.
  • Frames that are too tight can press into your temples or nose. If they’re too loose, they’ll slide constantly. These annoyances add up, especially if you wear your glasses all day. 
  • Your lenses are carefully crafted to match your prescription, but if they sit too high, too low, or too close/far from your eyes, you may encounter problems. This misalignment can blur or distort your vision or cause eye strain or headaches, even with the right prescription. 
  • Virtual try-on tools can give a rough visual, but they can’t assess bridge width, temple length, or how the frame will actually feel on your face. Fit is personal, and best evaluated in-office by a qualified professional. 


Frame Quality and Adjustability

Woman looking at eyeglasses on display in an optical shop.
  • Many online glasses are made with low-cost plastic or metals that can break easily, be difficult to fit properly, or become uncomfortable over time. What looks stylish in a photo might not hold up to daily wear. 
  • At a clinic, you can compare materials hands-on -from flexible titanium to lightweight acetates- and get expert advice on which frames are built to last based on your lifestyle and needs. 
  • Some lower-quality materials may contain nickel or other allergens. In-person care allows for safer choices if you have skin sensitivities. 


Lenses

A pair of eyeglasses with rectangular lenses, held in a hand. The glasses have a dark frame.
  • Online retailers often rely on self-measured pupillary distance (PD) and height estimates. Even small inaccuracies here can impact how sharp your vision is through the lenses. 
  • Anti-reflective, scratch-resistant, and blue light coatings vary in quality. Many lower-cost lenses skip these or use subpar versions, which can affect durability and comfort, especially during screen use or night driving. 
  • Small errors may cause significant problems, especially when prescriptions are complex, higher in strength or involve astigmatism or progressive lenses. You may not realize the problem until you start experiencing symptoms.


What In-Clinic Care Does Better

Personalized frame fitting

A licensed optician or qualified optical consultant helps you find frames that match your facial structure, nose bridge, and daily habits. This ensures your glasses stay comfortable and properly aligned.


Professional lens measurements

Optical examination: patient wears glasses. Equipment and tablet used for measurements. Clinic setting.

We use precise tools to measure PD and optical center height, so your lenses are aligned exactly where your eyes need them to be.


On-the-spot adjustments

Small tweaks at the clinic ensure your glasses don’t slip, tilt, or press in the wrong places. You leave with a fit that feels natural and secure.


Expert advice

You’ll get one-on-one support choosing frames and lenses that suit your prescription, face shape, and lifestyle. We help you balance style, comfort, and clarity with the confidence that your glasses will live up to your expectations for all-day performance.


When it comes to eyewear, getting the right fit, measurements, and quality of material and fabrication make all the difference. Book your eye exam today and let us help you find glasses that feel great and help you see your best.


FAQ

What are the benefits of buying glasses in person? 

An in-person experience allows for professional fitting, accurate measurements, and a chance to physically try on frames. This helps ensure better comfort and vision right from the start. 


How do local clinics’ pricing compare to online?

While online deals may appear lower upfront, quality and technology are often markedly inferior to eyewear available from an independent provider. These differences become obvious with regular daily wear, and factors such as durability and adjustability. Additionally, local clinics often include services like adjustments, repairs, and personalized guidance.


What if my glasses need an adjustment later? 

An independent optical store will normally offer follow-up services if your glasses need fine-tuning. You can usually walk in and get help quickly.

A man in a blue shirt is standing in front of a wall of glasses.

Written by Rosendo 

About the Author: 

Rosendo was born and raised in Havana, Cuba, where he began his professional journey studying Optometry and Optics. His career then took him to Dubai, where he worked in the optical field for two years as a Sales Associate. Now, he’s settled in Calgary and takes great pride in being a valued member of our Mountain View Optometry team as an Optical Associate.

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