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2. List of soft contact lens materials - Wikipedia

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

   Types. The FDA classifies soft contact lenses into four groups for the US market. They are also subcategorized into 1st generation, 2nd generation, and 3rd generation lens materials. [6] These 'water-loving' soft contact lens materials are categorized as "Conventional Hydrophilic Material Groups ("-filcon"): Group. Water Content.

3. Anastigmat - Wikipedia

   en.wikipedia.org/wiki/Anastigmat

   An anastigmat or anastigmatic lens is a photographic lens completely corrected for the three main optical aberrations: spherical aberration, coma, and astigmatism. Early lenses often included the word Anastigmat in their name to advertise this new feature ( Doppel-Anastigmat, Voigtländer Anastigmat Skopar, etc.).

4. Astigmatism - Wikipedia

   en.wikipedia.org/wiki/Astigmatism

   Against-the-rule astigmatism – the horizontal meridian is steepest (a rugby ball or American football standing on its end). [17] Oblique astigmatism – the steepest curve lies in between 120 and 150 degrees and 30 and 60 degrees. [17] Irregular astigmatism – principal meridians are not perpendicular.

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   NatureWell Clinical Retinol Advanced Moisture Cream. $10$25. Save $15 with coupon. This nongreasy cream is formulated to renew, hydrate and firm your skin from head to toe. Note: A small amount ...

6. Astigmatism (optical systems) - Wikipedia

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

   Astigmatism (optical systems) An optical system with astigmatism is one where rays that propagate in two perpendicular planes have different foci. If an optical system with astigmatism is used to form an image of a cross, the vertical and horizontal lines will be in sharp focus at two different distances. The term comes from the Greek α- ( a ...

7. Best best mosquito repellents and bug sprays for summer ... - AOL

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   Sawyer Products Picaridin Insect Repellent, 2-Pack. This nongreasy repellent staves off mosquitos for up to 14 hours and ticks, chiggers, flies and fleas for up to eight hours. You can use it on ...