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Results 1 - 5 of 5 for Optometry
  • Dioptre - The Definition of Dioptre
    Article - 17 Nov 2007
    Dioptre is a measurement unit that describes the optical power of a lens or a curved mirror. Dioptre can be expressed as the reciprocal value of its focal length in meters.
  • An Introduction to Refractometry
    Article - 25 Oct 2007
    You’ve lost the key to your locker in the swimming pool. You spot it lying on the bottom of the shallow part of the pool, reach in to take it – and your hand misses. The refraction of light at the...
  • Toric Lens - Definition and Applications
    Article - 6 Feb 2014
    Toric lens is a special type of lens having two different focal length and optical power in orientations that are perpendicular to each other.
  • What is the Role of Lenses in Microscopy?
    Article - 24 Oct 2022
    A microscope is used to magnify the image of tiny objects. The objects are clearly seen with a microscope because at least one lens magnifies the image. This lens refracts the light so that it enters...
  • What is Lensless Holographic Microscopy?
    Article - 25 Feb 2022
    A new lensless holographic microscopy technique promises high-quality imaging and analysis of biological samples without the need for lenses and could transform access to healthcare worldwide.

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