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  2. AN/PSQ-42 - Wikipedia

    en.wikipedia.org/wiki/AN/PSQ-42

    A U.S. Army soldier wearing an IHPS helmet with ENVG-B goggles mounted. The AN/PSQ-42 Enhanced Night Vision Goggle-Binocular ( ENVG-B) is a third-generation passive binocular night vision device developed for the United States Army by L3Harris. It combines dual tube image-intensifying (I²) and thermal-imaging technologies into a single goggle ...

  3. Night-vision device - Wikipedia

    en.wikipedia.org/wiki/Night-vision_device

    First-person view through night-vision goggles of the FBI Hostage Rescue Team using an airboat. A night-vision device (NVD), also known as a night optical/observation device (NOD) or night-vision goggle (NVG), is an optoelectronic device that allows visualization of images in low levels of light, improving the user's night vision.

  4. AN/PSQ-20 - Wikipedia

    en.wikipedia.org/wiki/AN/PSQ-20

    1x. The AN/PSQ-20 Enhanced Night Vision Goggle ( ENVG) is a third-generation passive monocular night vision device developed for the United States Armed Forces by ITT Exelis. It fuses image-intensifying and thermal-imaging technologies, enabling vision in conditions with very little light. The two methods can be used simultaneously or individually.

  5. Astigmatism - Wikipedia

    en.wikipedia.org/wiki/Astigmatism

    Mild astigmatism has a higher prevalence than moderate and significant astigmatisms and increased until the age of 70, while moderate and significant astigmatisms showed an increase in prevalence after the age of 70. [33] Of the levels of astigmatism, mild astigmatism is most prevalent, making up about 82% of the total reported astigmatisms. [33]

  6. AN/PVS-14 - Wikipedia

    en.wikipedia.org/wiki/AN/PVS-14

    AN/PVS-14. An AN/PVS-14 night vision device. The AN/PVS-14 Monocular Night Vision Device (MNVD) is in widespread use by the United States Armed Forces as well as NATO allies around the world. [ 3] It uses a third generation image intensifier tube, and is primarily manufactured by Litton Industries (Now L-3 Warrior Systems) and Elbit Systems of ...

  7. Why astigmatism causes blurry vision, especially at night - AOL

    www.aol.com/news/why-astigmatism-causes-blurry...

    Astigmatism, a disorder that affects how the eyes focus light, can be exacerbated at night. Blurry vision and headaches are symptoms of astigmatism. Why astigmatism causes blurry vision ...

  8. Aberrations of the eye - Wikipedia

    en.wikipedia.org/wiki/Aberrations_of_the_eye

    The small improvement in depth of focus with the conventional IOLs enhances uncorrected near vision and contribute to reading ability. [15] Wavefront customized lenses can be used in eyeglasses. Based on Wavefront map of the eye and with the use of laser a lens is shaped to compensate for the aberrations of the eye and then put in the eyeglasses.

  9. Christus Health donation will help pay for night-vision ... - AOL

    www.aol.com/christus-health-donation-help-pay...

    Christus Health donated almost $100,000 to the Louisiana State Troopers Association Tuesday so the agency could upgrade their night vision goggles, a partnership between law enforcement and health ...

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