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2. List of soft contact lens materials - Wikipedia

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

   Clariti 1 day, Clariti 1 day toric, Clariti 1 day multifocal, Live daily disposable Fanfilcon A: 55: 90-110: 0.6: 0.06: Avaira Vitality, Avaira Vitality toric, 24H Toric Samfilcon A: 46 [23] 163 [24] 0.7: 0.07: Bausch & Lomb Ultra, Bausch & Lomb Ultra for Astigmatism, Bausch & Lomb Ultra for Presbyopia Elastofilcon: 0.2: 340: SilSoft Aphakic ...

3. 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.

4. 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 .

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Man Accused of Killing Wife with Homemade Spear in 'Very ...

   www.aol.com/man-accused-killing-wife-homemade...

   An Australian man is accused of murdering his wife with a homemade spear. Talaat Hawatt, also known as Terrance Howot, is accused of having attacked his wife Khouloud Bakour Hawatt with the weapon ...

7. Astigmatism (optical systems) - Wikipedia

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

   Although a person may not notice mild astigmatism, higher amounts of astigmatism may cause blurry vision, squinting, asthenopia, fatigue, or headaches. [ 10 ] [ 11 ] [ 12 ] There are a number of tests that are used by ophthalmologists and optometrists during eye examinations to determine the presence of astigmatism and to quantify the amount ...