9 Common Mistakes to Avoid When Buying Sunglasses Online

Buying sunglasses online feels easy — a few scrolls, a stylish pair in your cart, and done.
But here’s the truth: a lot can go wrong between the click and the delivery.

The wrong size, poor UV protection, fake branding, or just a frame that doesn’t suit your face — all of it can turn your excitement into regret.
To make sure that doesn’t happen, here are some common mistakes people make when shopping for sunglasses online — and how you can avoid them.

1. Ignoring Fit and Frame Measurements

Sunglasses aren’t one-size-fits-all. Every pair has three key measurements — usually printed inside the arm — that determine how well it fits your face:

• Lens width: How wide each lens is – too small makes your face look bigger, too wide and they’ll keep slipping.
• Bridge width: The distance between the two lenses – it affects how your sunglasses sit on your nose.
• Temple length: The length of the arms – this decides how comfortably they stay behind your ears.

Before you buy, check these numbers on your current pair or compare them with the size guide most websites provide. Getting the right measurements is the difference between a comfortable fit and a constant adjustment struggle.

2. Forgetting About Face Shape and Bridge Fit

Your face shape plays a huge role in finding the right frame.
Here’s a quick reference:

• Round faces: Look best with angular or geometric frames.
• Square faces: Softer, round or oval sunglasses balance the structure.
• Heart-shaped faces: Cat-eye or top-heavy frames complement the cheekbones.

Also, consider your nose bridge fit —

If your nose bridge is lower or you have higher cheekbones, go for low-bridge or Asian-fit sunglasses.
They sit comfortably and don’t slide down your face.

3. Relying Too Much on Virtual Try-Ons

Virtual try-on tools are a great way to explore styles, but they’re not a substitute for understanding fit and comfort.
They show you how sunglasses look, but not always how they’ll feel. A pair might appear perfect on-screen but could be too tight or wide in reality.

At Eyemode, we offer an advanced Virtual Try-On feature that helps you visualize frames on your face before you buy. It’s a helpful starting point to shortlist what suits your shape and personality best.
However, we always recommend checking size guides and product details to ensure your sunglasses fit as well as they look.

4. Confusing Dark Tint with UV Protection

One of the biggest mistakes when buying sunglasses online is assuming that darker lenses mean better eye protection.
That’s not true.

A dark tint only reduces brightness, but it doesn’t block harmful UV rays. In fact, sunglasses without UV protection can be more damaging, since your pupils dilate behind dark lenses and let in more light.

Polarized sunglasses online are popular, but make sure they’re also UV-protected for complete eye safety. Always look for “100% UV protection” or “UV400 protection” before you buy. That’s what keeps your eyes safe.

5. Thinking Polarized Means UV-Protected

Polarized lenses are great — they cut glare and make everything look sharper, especially while driving or being outdoors.
But polarization has nothing to do with UV protection.

For full protection, make sure your polarized sunglasses also mention UV400 or 100% UV protection. The best pairs combine both.

6. Overlooking Anti-Reflective (AR) Coating

An anti-reflective coating makes a huge difference, especially if you spend time outdoors or near water.
It stops light from bouncing off the inner surface of your lenses and into your eyes, improving visibility and comfort.

If you’re investing in good sunglasses, AR coating is worth it — it reduces strain and makes your vision clearer in bright conditions.

7. Falling for Unrealistic Discounts

If a pair of “luxury” sunglasses is 80% off on a site you’ve never heard of — it’s probably too good to be true.
Fake sunglasses are everywhere online, and they often skip proper UV protection altogether.

Before buying branded eyeglasses online, look for signs of authenticity:

• Clear, engraved branding (not printed stickers)
• Quality hinges and a sturdy build
• Official packaging and a certificate of authenticity

When in doubt, buy from reputable online eyewear stores that list complete product details and warranty coverage.

8. Skipping the Return Policy

Return policies matter, especially when shopping for something that needs to fit perfectly.
Many online stores only accept returns within 7–15 days or charge a restocking fee.

If you’re ordering from international websites, keep in mind that shipping fees and customs charges might not be refundable.
Always read the return and exchange terms before placing your order — it’ll save you unnecessary stress later.

9. Trying DIY Adjustments at Home

It’s tempting to fix a slightly loose frame yourself, but it’s easy to overdo it.
Heating or bending sunglasses without proper tools can damage the hinges or void the warranty.

If you need adjustments, visit an optician — most offer free or inexpensive fitting services, even for online purchases.

The Smarter Way to Buy Sunglasses Online

Here’s a simple checklist to keep in mind before you checkout:

1. Know your measurements. A perfect fit matters more than anything.
2. Check for UV400 or 100% UV protection. This is non-negotiable.
3. Look for authenticity. Stick to trusted websites or authorized sellers.
4. Read the fine print. Return, warranty, and shipping details make all the difference.

Buying sunglasses online can be effortless — as long as you know what to look for.
The right pair should protect your eyes, fit your face, and make you feel confident the moment you put them on.