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Tech & Science Don't Buy Glasses Online If You Have A Strong Or Complicated Prescription

23:15  16 february  2020
23:15  16 february  2020 Source:   lifehacker.com.au

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When you ’re buying new glasses , shopping online can be an easy and often cheaper alternative to visiting a traditional eyeglass store. Wirecutter notes that if you have a weak prescription , then this likely isn’ t going to be a huge deal. According to Dr. Neil Pence, associate dean for clinical and patient

Don ' t Buy Glasses Online if You Have a Strong or Complicated Prescription . If you ’re looking for something to watch this holiday weekend, now you have one more place to look. Redbox, the company behind those DVD rental boxes at gas stations and grocery stores, launched its own free

a close up of a small mirror: Image: Shutterstock, Sarinya Pinngam / EyeEm© Image: Shutterstock, Sarinya Pinngam / EyeEm Image: Shutterstock, Sarinya Pinngam / EyeEm

When you’re buying new glasses, shopping online can be an easy and often cheaper alternative to visiting a traditional eyeglass store. As it turns out, depending on your prescription, it can also mean that those glasses you buy might not be quite as useful.

The issue comes from the fact that you’re not actually there to try on those frames, so the person making them doesn’t know how you’re going to look through them, Wirecutter reports.

Specifically, online glasses companies make frames so that the vertical centre of vision (where your eyes are looking through the frame) is in the centre of the frame. An optician at a shop; however, will measure where your centre of vision is and instead put that centre of vision where it actually is.

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In the market for new glasses ? Many online retailers offer eyewear that's significantly cheaper than what you 'd pay at your optometrist's If you don ' t see your pupillary distance on your prescription after you 've had your eyes examined, ask for it. Cons: Complicated website, mediocre return policy.

Firmoo.com - Buy Prescription Glasses Online . After wearing too strong concave lenses, you might get a temporary change where, if you switch back to the proper strength glasses , it might take a little while for your eyes to realize they don ' t need as much accommidation as before, but I don ' t think

Wirecutter tried out a ton of different online glasses companies. While the company Flex + Iris did include a marker in its at-home try-on kits to have you mark your centre of vision, none of the others did. Instead, they essentially guessed at it by putting it in the centre. For some frames, that will work great. For others, you might be looking more toward the top or the bottom of the frames than the centre, which means your glasses won’t be as effective.

It’s not just the glasses fault. We’re all built a little different, so the same frames will likely fit me a little different than they fit you, that means we’ll both have a different centre of vision.

Wirecutter notes that if you have a weak prescription, then this likely isn’t going to be a huge deal. According to Dr. Neil Pence, associate dean for clinical and patient care services at the Indiana University School of Optometry who spoke with the site, in general, your prescription will need to be from about a -4 or a +4 for it to be a problem, but then it can be a pretty big problem.

People with stronger prescriptions will also have thicker lenses in their glasses. That lens “centre” is where the glass will be thinner. When yours is off, you’ll be looking through thicker glass, or oddly through thick and thin parts, which can make things look distorted or you’ll feel like you’re cross-eyed.

Online sites can be great for finding deals, but if you end up with a pair of glasses you can’t really see through, then that saving might not be worth it.

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