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  2. Mesopic vision - Wikipedia

    en.wikipedia.org/wiki/Mesopic_vision

    Mesopic vision, sometimes also called twilight vision, is a combination of photopic and scotopic vision under low-light (but not necessarily dark) conditions. [1] Mesopic levels range approximately from 0.01 to 3.0 cd/m 2 in luminance .

  3. Scotopic vision - Wikipedia

    en.wikipedia.org/wiki/Scotopic_vision

    Mesopic vision occurs in intermediate lighting conditions (luminance level 10 −3 to 10 0.5 cd/m 2) [citation needed] and is effectively a combination of scotopic and photopic vision. This gives inaccurate visual acuity and color discrimination. In normal light (luminance level 10 to 10 8 cd/m 2), the vision of cone cells dominates and is ...

  4. Purkinje effect - Wikipedia

    en.wikipedia.org/wiki/Purkinje_effect

    An animated sequence of simulated appearances of a red flower (of a zonal geranium) and background foliage under photopic, mesopic, and scotopic conditions. The Purkinje effect or Purkinje phenomenon (Czech: [ˈpurkɪɲɛ] ⓘ; sometimes called the Purkinje shift, often pronounced / p ər ˈ k ɪ n dʒ i /) [1] is the tendency for the peak luminance sensitivity of the eye to shift toward the ...

  5. Why Some People Will See Mind-Blowing Colors on April 8

    www.aol.com/lifestyle/why-people-see-mind...

    This transitional period—known as mesopic vision, when the two retina receptors word in tandem—produces a hybrid-style color perception that puts a focus on some colors more than others. The ...

  6. Wear red and green to experience the Purkinje effect during ...

    www.aol.com/total-solar-eclipse-create-optical...

    In mesopic vision, the surroundings will have a gray or “sepia tone” look, according to the Saint Louis Science Center. But for those not on the path of totality, the effect might still be ...

  7. Photometry (optics) - Wikipedia

    en.wikipedia.org/wiki/Photometry_(optics)

    Photopic vision is characteristic of the eye's response at luminance levels over three candela per square metre. Scotopic vision occurs below 2 × 10 −5 cd/m 2. Mesopic vision occurs between these limits and is not well characterised for spectral response. [2] [1]

  8. Visual perception - Wikipedia

    en.wikipedia.org/wiki/Visual_perception

    There were two major ancient Greek schools, providing a primitive explanation of how vision works. The first was the "emission theory" of vision which maintained that vision occurs when rays emanate from the eyes and are intercepted by visual objects. If an object was seen directly it was by 'means of rays' coming out of the eyes and again ...

  9. Photopic vision - Wikipedia

    en.wikipedia.org/wiki/Photopic_vision

    Photopic vision is the vision of the eye under well-lit conditions (luminance levels from 10 to 10 8 cd/m 2). In humans and many other animals, photopic vision allows color perception , mediated by cone cells , and a significantly higher visual acuity and temporal resolution than available with scotopic vision .