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  2. Thin lens - Wikipedia

    en.wikipedia.org/wiki/Thin_lens

    A lens may be considered a thin lens if its thickness is much less than the radii of curvature of its surfaces (d ≪ | R 1 | and d ≪ | R 2 |).. In optics, a thin lens is a lens with a thickness (distance along the optical axis between the two surfaces of the lens) that is negligible compared to the radii of curvature of the lens surfaces.

  3. List of Minolta A-mount lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Minolta_A-mount_lenses

    While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. DT "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of ...

  4. Acuvue - Wikipedia

    en.wikipedia.org/wiki/Acuvue

    Acuvue lenses got their start at Frontier Contact Lens Company, founded in Buffalo, New York in 1959 by Dr. Allen Isen, George Sitterle, and Dr. William Feinbloom. [1] Its early growth was attributed to its highly successful toric lens.

  5. Human eye - Wikipedia

    en.wikipedia.org/wiki/Human_eye

    Personal factors (e.g. use of contact lenses, eye make-up, and certain medications) may also affect destabilization of the tear film and possibly result in more eye symptoms. [62] Nevertheless, if airborne particles alone should destabilize the tear film and cause eye irritation, their content of surface-active compounds must be high. [62]

  6. Google Contact Lens - Wikipedia

    en.wikipedia.org/wiki/Google_Contact_Lens

    Google Contact Lens was a smart contact lens project announced by Google on 16 January 2014. [1] The project aimed to assist people with diabetes by constantly measuring the glucose levels in their tears. [2] The project was being carried out by Verily and as of 2014 was being tested using prototypes. [1]

  7. List of Leica lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Leica_lenses

    Leica 50 mm f /1.4 Summilux-R 3rd version – 1997 (ROM contacts) Leica 60 mm Macro-Elmarit-R 1st version – 1972 – outside bayonet lens hood fitting Leica 60 mm Macro-Elmarit-R dn2 version

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