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2. Glasses - Wikipedia

   en.wikipedia.org/wiki/Glasses

   Clip-on sunglasses or sunglass clips can be attached to another pair of glasses. Some wrap-around sunglasses are large enough to be worn over another pair of glasses. Otherwise, many people opt to wear contact lenses to correct their vision so that standard sunglasses can be used. Mixed double-frame (Flip glasses)

3. I tried those Pair Eyewear glasses with the magnetic ... - AOL

   www.aol.com/lifestyle/tried-those-pair-eyewear...

   Actually, this is the "confetti top," one of dozens of magnetic clip-ons you can add to any Pair Eyewear glasses. ... (which effectively turn your glasses into sunglasses — regular tops are just ...

4. Bienfang's test - Wikipedia

   en.wikipedia.org/wiki/Bienfang's_test

   Bienfang's test is a clinical test used in the diagnosis of ocular myasthenia gravis. It is used in conjunction with other examination techniques such as Cogan's lid twitch test [1] or enhancement of blepharoptosis from prolonged upward gaze. [2] [3] It is a simple, quick, and non-invasive test for ocular myasthenia gravis that can be performed ...

5. Sunglasses - Wikipedia

   en.wikipedia.org/wiki/Sunglasses

   Hunter S. Thompson was known for wearing yellow-tinted driving glasses. When driving a vehicle, particularly at high speed, dazzling glare caused by a low Sun, or by lights reflecting off snow, puddles, other vehicles, or even the front of the vehicle, can be lethal. Sunglasses can protect against glare when driving.

6. 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.

7. Pulfrich effect - Wikipedia

   en.wikipedia.org/wiki/Pulfrich_effect

   The Pulfrich effect has been utilized to enable a type of stereoscopy, or 3-D visual effect, in visual media such as film and TV. As in other kinds of stereoscopy, glasses are used to create the illusion of a three-dimensional image. By placing a neutral filter (e.g., the darkened lens from a pair of sunglasses) over one eye, an image, as it ...