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  2. Cosmic ray visual phenomena - Wikipedia

    en.wikipedia.org/wiki/Cosmic_ray_visual_phenomena

    Cosmic ray visual phenomena, or light flashes (LF), also known as Astronaut's Eye, are spontaneous flashes of light visually perceived by some astronauts outside the magnetosphere of the Earth, such as during the Apollo program.

  3. Photopsia - Wikipedia

    en.wikipedia.org/wiki/Photopsia

    Photopsia is the presence of perceived flashes of light in the field of vision. It is most commonly associated with: [4] posterior vitreous detachment; migraine aura (ocular migraine / retinal migraine) migraine aura without headache; scintillating scotoma; retinal break or detachment; occipital lobe infarction (similar to occipital stroke)

  4. Moore's lightning streaks - Wikipedia

    en.wikipedia.org/wiki/Moore's_lightning_streaks

    Moore's lightning streaks are lightning type streaks (seen to the temporal side) due to sudden head or eye movement in the dark. They are generally caused by shock waves in the vitreous humor hitting the retina or traction on the retina from fibers in the vitreous humor .

  5. If You’re Seeing Eye Floaters or Flashes, Here’s What to Do ...

    www.aol.com/seeing-eye-floaters-flashes-them...

    Floaters drift around your field of vision and dart away when you try to look at them directly, eventually settling at the bottom of your eye and out of your sightline. Floaters appear when the ...

  6. Huh? If Your Right Eye Is Twitching, There Could Be a ... - AOL

    www.aol.com/huh-eye-twitching-could-spiritual...

    When your right eye is twitching, it could be due to stress, fatigue or even dry eyes. Unless there's an underlying medical condition, eye twitches tend to come and go like the wind.

  7. Flash blindness - Wikipedia

    en.wikipedia.org/wiki/Flash_blindness

    Flash blindness is an either temporary or permanent visual impairment during and following exposure of a varying length of time to a light flash of extremely high intensity, such as a nuclear explosion, flash photograph, lightning strike, or extremely bright light, i.e. a searchlight, laser pointer, landing lights or ultraviolet light. [1]

  8. Entoptic phenomenon - Wikipedia

    en.wikipedia.org/wiki/Entoptic_phenomenon

    Some examples of entoptical effects include: Floaters depiction Purkinje tree depiction. Floaters or muscae volitantes are slowly drifting blobs of varying size, shape, and transparency, which are particularly noticeable when viewing a bright, featureless background (such as the sky) or a point source of diffuse light very close to the eye.

  9. Adaptation (eye) - Wikipedia

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

    The human eye can function from very dark to very bright levels of light; its sensing capabilities reach across nine orders of magnitude. This means that the brightest and the darkest light signal that the eye can sense are a factor of roughly 1,000,000,000 apart. However, in any given moment of time, the eye can only sense a contrast ratio of ...

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