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2. Corrective lens - Wikipedia

   en.wikipedia.org/wiki/Corrective_lens

   Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.

3. Abbe number - Wikipedia

   en.wikipedia.org/wiki/Abbe_number

   Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...

4. Chromatic aberration - Wikipedia

   en.wikipedia.org/wiki/Chromatic_aberration

   Chromatic aberration. Focal length of lens varies with the color of light. In optics, chromatic aberration ( CA ), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. [ 1][ 2] It is caused by dispersion: the refractive index of the lens elements ...

5. Optical aberration - Wikipedia

   en.wikipedia.org/wiki/Optical_aberration

   1: Imaging by a lens with chromatic aberration. 2: A lens with less chromatic aberration. In optics, aberration is a property of optical systems, such as lenses, that causes light to be spread out over some region of space rather than focused to a point. [ 1] Aberrations cause the image formed by a lens to be blurred or distorted, with the ...

6. New criteria defined for memory loss condition often mistaken ...

   www.aol.com/criteria-defined-memory-loss...

   Jones and his team developed new criteria to help physicians in diagnosing LANS that include the following core clinical factors: presents with a slow, predominant neurodegenerative condition with ...

7. Condenser (optics) - Wikipedia

   en.wikipedia.org/wiki/Condenser_(optics)

   Condenser (optics) A condenser is an optical lens that renders a divergent light beam from a point light source into a parallel or converging beam to illuminate an object to be imaged. Condensers are an essential part of any imaging device, such as microscopes, enlargers, slide projectors, and telescopes. The concept is applicable to all kinds ...

8. US FDA approves Adaptimmune's therapy for rare type of cancer

   www.aol.com/news/us-fda-approves-adaptimmunes...

   By Mariam Sunny. (Reuters) -The U.S. Food and Drug Administration said on Friday it has approved Adaptimmune's first-of-its-kind treatment for a rare type of cancer in the soft tissues that most ...

9. Accommodation (vertebrate eye) - Wikipedia

   en.wikipedia.org/wiki/Accommodation_(vertebrate_eye)

   The 1 cm spaced grid indicates a near focus focal length of around 6cm. Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point —the maximum distance from the eye for which a clear image of ...