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  2. Belay glasses - Wikipedia

    en.wikipedia.org/wiki/Belay_glasses

    The design based on the eyeglasses frame provides for a split field of vision: the central field through the lenses, providing a vertical view to the climber; the peripheral field around the sides of the lenses, allowing the belayer to remain aware of their surroundings.

  3. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism correction. Prism lenses (here unusually thick) are used for pre-operative prism adaptation. Eye care professionals use prism correction as a component of some eyeglass prescriptions. A lens which includes some amount of prism correction will displace the viewed image horizontally, vertically, or a combination of both directions.

  4. Polarized 3D system - Wikipedia

    en.wikipedia.org/wiki/Polarized_3D_system

    The vertical components of all waves are transmitted, while the horizontal components are absorbed and reflected. Circularly polarized glasses. To present a stereoscopic motion picture, two images are projected superimposed onto the same screen through circular polarizing filters of opposite handedness. The viewer wears eyeglasses which contain ...

  5. Chromatic aberration - Wikipedia

    en.wikipedia.org/wiki/Chromatic_aberration

    Color shifting through corner of eyeglasses Severe purple fringing can be seen at the edges of the horse's forelock, mane, and ear. This photo taken with the lens aperture wide open resulting in a narrow depth-of-field and strong axial CA.

  6. Progressive lens - Wikipedia

    en.wikipedia.org/wiki/Progressive_lens

    Progressive lenses are corrective lenses used in eyeglasses to correct presbyopia and other disorders of accommodation. They are characterised by a gradient of increasing lens power, added to the wearer's correction for the other refractive errors.

  7. Mamiya RZ67 - Wikipedia

    en.wikipedia.org/wiki/Mamiya_RZ67

    The RZ67 measures 104mm (W) × 133.5mm (H) × 211.5mm (L) with the 110mm f/2.8 lens, and weighs approximately 2.4kg (5.29lbs). The flange distance is 105mm. The RZ67 name is adopted from the model name of the Mamiya RB67 (in which RB stands for "Revolving Back"), which was first introduced in 1970.