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  2. Wait, So Do Blue Light Glasses Actually Work? Here's What ...

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    Researchers looked at 17 randomized controlled trials on blue-light filtering glasses to see whether or not there was evidence that blue-light glasses could help visual performance and fatigue or ...

  3. Do blue light glasses actually protect your eyes? Eye doctors ...

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    Many of the glasses that claim to block higher amounts of blue light may have a yellow, orange or amber tint, Adair says, but the glasses also come in clear varieties.

  4. Are blue light glasses really worth it? A new analysis says ...

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    Experts say there are ways to improve visual comfort without the glasses: Vary the types of things you are focusing on, or your field of vision. Looking at a computer all day only engages a ...

  5. Night-vision device - Wikipedia

    en.wikipedia.org/wiki/Night-vision_device

    The effect on the natural night vision of the eye is evident A standard telescopic sight augmented with a night-vision device in front on the M110. Note that in addition to the image intensifier, the NVD gathers much more light by its much larger aperture A 1PN51-2 night-vision reticle with markings for range estimation First-person view ...

  6. Night vision - Wikipedia

    en.wikipedia.org/wiki/Night_vision

    A specific type of NVD, the night vision goggle (NVG) is a night vision device with dual eyepieces. The device can utilize either one intensifier tube with the same image sent to both eyes, or a separate image intensifier tube for each eye. Night vision goggles combined with magnification lenses constitutes night vision binoculars.

  7. Orthokeratology - Wikipedia

    en.wikipedia.org/wiki/Orthokeratology

    Orthokeratology lens. Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia ...