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2. List of soft contact lens materials - Wikipedia

   en.wikipedia.org/wiki/List_of_soft_contact_lens...

   Alden HP Sphere, Alden HP Toric, ExtremeH₂O 54%, Clarity H₂0, C-Vue Advanced Custom Toric Nelfilcon A: 69: 26: Focus Dailies, Focus Dailies Toric/Progressive, Dailies AquaComfort Plus, FreshLook One-Day, Synergy, Triton Hilafilcon A: 70: 35: Hilafilcon B: 59: 22: SofLens 59, SofLens Daily Disposable, SofLens Daily Disposables for ...

3. Toric lens - Wikipedia

   en.wikipedia.org/wiki/Toric_lens

   Toric lens surface as "cap" (top-right) from a torus (here with R = 1.2 r). A toric lens is a lens with different optical power and focal length in two orientations perpendicular to each other. One of the lens surfaces is shaped like a "cap" from a torus (see figure at right), and the other one is usually spherical .

4. Contact lens - Wikipedia

   en.wikipedia.org/wiki/Contact_lens

   Artist's impression of Leonardo's method for neutralizing the refractive power of the cornea. Leonardo da Vinci is frequently credited with introducing the idea of contact lenses in his 1508 Codex of the eye, Manual D, [9] wherein he described a method of directly altering corneal power by either submerging the head in a bowl of water or wearing a water-filled glass hemisphere over the eye.

5. Astigmatism (optical systems) - Wikipedia

   en.wikipedia.org/wiki/Astigmatism_(optical_systems)

   Astigmatism causes difficulties in seeing fine detail. Astigmatism can be often corrected by glasses with a lens that has different radii of curvature in different planes (a cylindrical lens), contact lenses, or refractive surgery. [5] Astigmatism is quite common. Studies have shown that about one in three people suffers from it.

6. When It Comes to Weight Loss, These 2 Nutrients Can Help ...

   www.aol.com/lifestyle/comes-weight-loss-2...

   The study asked 22 people to attend 19 dietary educational sessions over a year, plus complete some educational homework. The researchers then tracked changes in the participant’s weight, diet ...

7. If you buy just one thing on Black Friday, it should be this ...

   www.aol.com/lifestyle/if-you-buy-just-one-thing...

   With all of the Black Friday sales going on now, you can find deals on pretty much everything under the sun, from mattresses to stocking stuffers.And among one of the very best personal care deals ...