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2. Worth 4 dot test - Wikipedia

   en.wikipedia.org/wiki/Worth_4_dot_test

   At both testing distances the patient is required to wear red-green goggles (with one red lens over one eye, usually the right, and one green lens over the left) When performing the test at far (distance) the W4LT instrument is composed of a silver box (mounted on the wall in front of the patient), which has four lights inside it.

3. These Are the Best Handheld Spotlights for Your Emergency ...

   www.aol.com/8-best-handheld-spotlights-home...

   Rechargeable LED Handheld Spotlight. This LE model features a front-facing spotlight and a large side lantern for added versatility. Its bright green color is easy to spot quickly in an emergency ...

4. Dark adaptor goggles - Wikipedia

   en.wikipedia.org/wiki/Dark_adaptor_goggles

   Dark adaptor goggles are goggles made with red-tinted plastic lenses. Dark adaptor goggles were invented by Wilhelm Trendelenburg in 1916. [1] The concept is based on the work by Antoine Béclère on dark adaptation of the eye, where it is noted that fluoroscopy relies on the use of the retinal rods of the eye.

5. Tactical light - Wikipedia

   en.wikipedia.org/wiki/Tactical_light

   Tactical lights can be fitted with lenses to produce certain colors, Colored lights or filters provide flexibility for different purposes. Red lights are best [ citation needed ] for preserving night vision for the law enforcement officer, due to their minimal impact on the rod cells in the eye, while blue light provides high contrast for ...

6. Slit lamp - Wikipedia

   en.wikipedia.org/wiki/Slit_lamp

   Eye examination with the aid of a slit lamp. Side view of a slit lamp machine. Cataract in human eye: magnified view seen on examination with the slit lamp. In ophthalmology and optometry, a slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye.

7. Toxic and nutritional optic neuropathy - Wikipedia

   en.wikipedia.org/wiki/Toxic_and_nutritional...

   Vision loss in toxic and nutritional optic neuropathy is bilateral, symmetric, painless, gradual, and progressive. Dyschromatopsia, a change in color vision, is often the first symptom. Some patients notice that certain colors, particularly red, are less bright or vivid; others have a general loss of color perception.

8. Adaptation (eye) - Wikipedia

   en.wikipedia.org/wiki/Adaptation_(eye)

   5.1 Red lights and lenses. 5.1.1 Evolutionary context. 5.1.2 Applications. 5.2 Vitamin A. ... It is the leading cause of vision loss among people age 50 and older. [27]

9. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!