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  2. Borescope - Wikipedia

    en.wikipedia.org/wiki/Borescope

    Schematic view of a rigid borescope Borescope in use, showing typical view through the device. A borescope (occasionally called a boroscope, though this spelling is nonstandard) is an optical instrument designed to assist visual inspection of narrow, difficult-to-reach cavities, consisting of a rigid or flexible tube with an eyepiece or display on one end, an objective lens or camera on the ...

  3. List of instruments used in otorhinolaryngology, head and ...

    en.wikipedia.org/wiki/List_of_instruments_used...

    to focus light into the cavity under inspection; mirror is concave and is used with a Chiron lamp to produce a parallel beam of light; doctor views through the hole (average diameter of mirror is 3 & 1/2" & that of hole is 1/4") Head mounted lights with head band: to focus light into the cavity under inspection Chiron lamp: source of light Katz ...

  4. Optical comparator - Wikipedia

    en.wikipedia.org/wiki/Optical_comparator

    The first commercial comparator was developed by James Hartness and Russell W. Porter. [2] Hartness' long-continuing work as the Chairman of the U.S.'s National Screw-Thread Commission led him to apply his familiarity with optics (from his avocations of astronomy and telescope-building) to the problem of screw thread inspection.

  5. Pinhole occluder - Wikipedia

    en.wikipedia.org/wiki/Pinhole_occluder

    An improvised pinhole has a similar but better effect. The same principle has also been applied as an alternative to corrective lenses: a screen of pinholes is mounted on an eyeglass frame and worn as pinhole glasses. Differential diagnosis: pinhole worsen vision: Macular diseases, [5] central lens opacities [6] Vision static with pinhole ...

  6. Slit lamp - Wikipedia

    en.wikipedia.org/wiki/Slit_lamp

    These optics usually take the form of a lens placed on or near the subject's cornea, which range in optical properties and practical application. [19] Watzke–Allen test is a test used in diagnosis of a full thickness macular hole and also to assess retinal function after surgical closure of the hole, with the help of slit lamp. [20] [21]

  7. List of instruments used in ophthalmology - Wikipedia

    en.wikipedia.org/wiki/List_of_instruments_used...

    a 26 gauge needle bent twice used for incising the anterior capsule of the lens in lens extraction Wire vectis: a loop of wire attached to a stack used to extract cataract affected lenses Irrigating vectis: a small hollow instrument with a used to introduce fluid into the anterior chamber to raise its pressure to aid cataract extraction [2] Canula

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  9. Optical microscope - Wikipedia

    en.wikipedia.org/wiki/Optical_microscope

    The stage is a platform below the objective lens which supports the specimen being viewed. In the center of the stage is a hole through which light passes to illuminate the specimen. The stage usually has arms to hold slides (rectangular glass plates with typical dimensions of 25×75 mm, on which the specimen is mounted). [citation needed]

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