Can I expect quality when I go for cheap eyewear glasses?

Ask your optician for the safety prescription glass as they will have to supply the prescription and will have heard all the good and the horror stories.

For plain safety glass go mil-spec.

Safety Glasses at Grainger® - Seamless Order Process Ad·www.grainger.ca/
Grainger® Canada is Canada's Largest Distributor of Industrial Products. Free Shipping. Over 500K Products. Canada's Largest MRO. 24/7 Support. Brands: 3M, Milwaukee, DeWalt.

Register NowView Pricing & Availability, Order
Faster, Track Deliveries and more!

Safety & ProtectionPromote Job Safety With A Variety
Of Safety And Protective Products.

Search Results Web results

How To Identify Ballistic Eyewear - Safety Glasses USA

blog.safetyglassesusa.com > how-to-identify-ballistic-rat...

May 11, 2017 - Military Standards. The Military's rigorous MIL-PRF 32432 Ballistic Fragmentation standard uses tests similar to those in the ANSI Z87.1 standard.

Military Safety Glasses - Safety Glasses USA

www.safetyglassesusa.com > Safety Glasses

Items 1 - 40 of 185 - The eyewear listed in this section meets or exceeds the U.S. Military Ballistic Standard MIL-PRF-31013. This standard subjects the eyewear to ...

15 Best Tactical Military Sunglasses Reviewed 2021 [For ...

survivalmag.net > Gear > Apparel/Body

Jump to Best Tactical Military Sunglasses Reviewed [For Shooting ... - The glasses are also built with comfort ... They're both great Z87 ballistic-rated tactical shooting glasses that'll give you ... pair of rugged, MIL-SPEC glasses. ‎Oakley Industrial M... · ‎Under Armor Igniter · ‎Frequently Asked Questions

If they are not too deep, use some Brasso-gently, also works on wristwatch crystals - though not mineral glass.

I can provide some general guidance on what you can do if you have broken frames from a pair of Fendi glasses:

1. Assess the damage: Determine the extent of the damage to the frames. If it's a minor issue like a loose screw or a small crack, you may be able to fix it yourself with basic repair tools.
2. Contact Fendi or an authorized retailer: Reach out to Fendi directly or visit an authorized retailer that carries Fendi eyewear. They may have repair services available or be able to guide you to an authorized repair center.
3. Seek local eyewear repair services: Look for local eyewear repair shops or opticians who specialize in repairing designer frames. They often have the expertise and tools to repair various types of eyewear.
4. Consider a third-party repair service: There are online repair services that specialize in eyewear repairs. They may offer options for mailing in your broken frames for assessment and repair.

different countries have different regulations, but the US recommends that the glasses be at least 1 mm at the thinnest part

it isn't glass, most are made from a composite shatter-proof plastic

i would check the user manual if it were me. Here´s the an excerpt from the manual.

* For more detail on usage of 3D Eyewear (Power button and Accessories etc.), please refer to operating manuals for the purchased 3D Eyewear seeing it differs depending on the type of 3D Eyewear (Model No. of 3D Eyewear).
Wearing the 3D Eyewear Turn on the 3D Eyewear Put on the 3D Eyewear
View When the HDMI receives information in which 3D mode is detected, 3D images are automatically displayed according to the signal. If the 3D images are not displayed correctly or the images cause discomfort, the images can be adjusted by "3D format select" or "3D settings". ? Change the view 3D?2D, 3D settings (p.25)
After Use Turn off the 3D Eyewear. After using the 3D Eyewear, store it in the case provided.

1.Styling that mimics that of adult sunglasses - cool, sophisticated and trendy.
2.Modern plastic styles in rich colors (no more bubble-gum colors).
3.Sports eyewear in scaled-down versions of adult styles.
4.Clip-on sunglasses for children's prescription eyeglasses. Clip-ons are readily available and reasonably priced. Instead of attaching with metal clips (which can scratch eyeglass lenses), you can now also buy sunglass clip-ons that are magnetically attached.
5.Brand name appeal. Kids are becoming nearly as brand-conscious as their parents and older siblings. Major eyewear manufacturers have teamed up with Disney, popular cartoons and young celebrities to create eyewear and sunglasses made for and appealing specifically to children.