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2. 1-800 Contacts buys the at-home eye exam provider 6over6 ...

   techcrunch.com/2019/12/17/1-800-contacts-buys...

   The Utah-based company has acquired 6over6 Vision for an undisclosed amount. Based in Israel, 6over6 Vision previously raised $15 million to commercialize its in-home eye exams based on a ...

3. 1-800 Contacts - Wikipedia

   en.wikipedia.org/wiki/1-800_Contacts

   1-800 Contacts. 1-800 Contacts Inc. is an American contact lens retailer based in Draper, Utah. The brands that 1-800 Contacts use includes Johnson & Johnson Vision Care, Alcon, Bausch & Lomb and CooperVision. The company was founded as the industry's first way to buy contacts online and has since expanded to provide online prescription ...

4. Eyeglass prescription - Wikipedia

   en.wikipedia.org/wiki/Eyeglass_prescription

   A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder. All spectacle and contact lenses would be made in minus cylinder.

5. Base curve radius - Wikipedia

   en.wikipedia.org/wiki/Base_curve_radius

   Typical values for a contact lens are from 8.0 to 10.0 mm. The base curve is the radius of the sphere of the back of the lens that the prescription describes (the lower the number, the steeper the curve of the cornea and the lens, the higher the number, the flatter the curve of the cornea and the lens).

6. Simple Contacts has a new service letting users cheaply ...

   techcrunch.com/2019/11/27/simple-contacts-has-a...

   Simple Contacts has launched a new service letting users try out new contact lenses for as little as $3.. The company launched a little over three years ago as a way for contact lens wearers to ...

7. Warby Parker's vision test app can help renew your glasses ...

   www.engadget.com/warby-parker-virtual-vision...

   The update isn't automatic. An eye doctor will review the results and give you a verdict within two days. If you're seeing well enough, you'll just need to pay $15 to renew your prescription. If ...