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  2. Help:Options to hide an image - Wikipedia

    en.wikipedia.org/wiki/Help:Options_to_hide_an_image

    By creating an account and reading Wikipedia while logged in. Logged-in users can use personal Cascading Style Sheets (CSS) to display images selectively (explained below). By filtering content locally, either by configuring their web browser (including the possibility to display no images at all), or by setting up a proxy (such as Privoxy ...

  3. Red-eye effect - Wikipedia

    en.wikipedia.org/wiki/Red-eye_effect

    Red-eye effect seen on a teenager. The red-eye effect in photography is the common appearance of red pupils in color photographs of the eyes of humans and several other animals. It occurs when using a photographic flash that is very close to the camera lens (as with most compact cameras) in ambient low light.

  4. Flicker fusion threshold - Wikipedia

    en.wikipedia.org/wiki/Flicker_fusion_threshold

    The flicker fusion threshold, also known as critical flicker frequency or flicker fusion rate, is the frequency at which a flickering light appears steady to the average human observer. It is a concept studied in vision science, more specifically in the psychophysics of visual perception. A traditional term for "flicker fusion" is "persistence ...

  5. Raygun Releases Statement on Olympics “Allegations” and ...

    www.aol.com/raygun-releases-statement-olympics...

    Raygun Releases Statement on Olympics AllegationsElsa - Getty Images. Raygun, the viral Australian Olympics breakdancer, has issued a statement amid a petition accusing her of “unethical conduct ...

  6. Does staring at screens ruin your eyes? - AOL

    www.aol.com/article/2014/02/27/does-staring-at...

    We've all grown up thinking that sitting too close to the television is damaging to our eyes ... but that might not be the case. Technology spawns lots of confusion ... and a few affectionately ...

  7. Biological effects of high-energy visible light - Wikipedia

    en.wikipedia.org/wiki/Biological_effects_of_high...

    Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.

  8. The dangers of LED face masks you should know about - AOL

    www.aol.com/lifestyle/dangers-led-face-masks...

    Palep herself was quite concerned with the dosage of the light therapy provided by the masks, as not every patient may require the same amount and duration of the treatment. "The potential dangers ...

  9. Screen reading - Wikipedia

    en.wikipedia.org/wiki/Screen_reading

    Javal discovered that while reading, one's eyes tend to jump across the text in saccades, and stop intermittently along each line in fixations. [1] Because of the lack of technology at the time, naked-eye observations were used to observe eye movement , until later in the late 19th and mid-20th century eye-tracking experiments were conducted in ...