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2. Boots Opticians - Wikipedia

   en.wikipedia.org/wiki/Boots_Opticians

   All of Boots Opticians' laser eye surgeries were bought by Optical Express in late 2004. [ citation needed ] On 29 January 2009, it was announced that Boots Opticians were to merge with Dollond & Aitchison , forming a chain of 690 stores and 5,000 staff after Boots purchased a controlling share in D&A. [ 5 ] [ 6 ] In May 2019, the company was ...

3. Sight magnifier - Wikipedia

   en.wikipedia.org/wiki/Sight_magnifier

   The pictured magnifier is flipped in, and is magnifying the view through the sight. [a] A sight magnifier is an optical telescope that can be paired with a non-magnifying optical sight on a weapon to create a telescopic sight. [1] [2] They work with the parallel collimated reticle image produced by red dot sights and holographic weapon sights.

4. Magnifying glass - Wikipedia

   en.wikipedia.org/wiki/Magnifying_glass

   Magnifying glass on an arm lamp. The magnification of a magnifying glass depends upon where it is placed between the user's eye and the object being viewed, and the total distance between them. The magnifying power is equivalent to angular magnification (this should not be confused with optical power, which is a different

5. Presbyopia - Wikipedia

   en.wikipedia.org/wiki/Presbyopia

   Corrective lenses provide vision correction over a range as high as +4.0 diopters. People with presbyopia require a convex lens for reading glasses; specialized preparations of convex lenses usually require the services of an optometrist. [15] Contact lenses can also be used to correct the focusing loss that comes along with presbyopia.

6. List of mythological objects - Wikipedia

   en.wikipedia.org/wiki/List_of_mythological_objects

   Hop-o'-My-Thumb stealing the Seven-league boots from the Ogre, by Gustave Doré Ǒusībùyúnlǚ ( 藕 絲 步 雲 履 ; "[Lotus-root Thread] Cloud-stepping Boots" or "~Shoes"), made of lotus fiber, these are one of the treasures of the Dragon Kings; Ào Ming gives them to Sun Wukong in order to get rid of him when he acquires the Ruyi Jingu Bang.

7. Magnification - Wikipedia

   en.wikipedia.org/wiki/Magnification

   By convention, for magnifying glasses and optical microscopes, where the size of the object is a linear dimension and the apparent size is an angle, the magnification is the ratio between the apparent (angular) size as seen in the eyepiece and the angular size of the object when placed at the conventional closest distance of distinct vision: 25 ...