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Update redirected URLs (part 43) #15935
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OnkarRuikar
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May 12, 2022 01:27
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Content:Accessibility
Accessibility docs
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May 12, 2022
OnkarRuikar
commented
May 12, 2022
@@ -25,15 +25,15 @@ This article introduces concepts behind making web content accessible for those | |||
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Seizures caused by light are known as photosensitive epilepsy. Content that flickers, flashes, or blinks can trigger photosensitive epilepsy. Web technologies that use video, animated gifs, animated pngs, animated SVGs, Canvas, and CSS or JavaScript animations are all capable of content that can induce seizures or other incapacitating physical reactions. Certain visual patterns, especially stripes, can also cause physical reactions even though they are not animated. Photosensitive epilepsy is actually a kind of "reflex epilepsy"—seizures occurring in response to a trigger. In the case of photosensitive epilepsy, seizures are triggered specifically by flashing lights, but other types of reflex epilepsies may be triggered by the act of reading, or by noises. Patterns and images can also trigger epilepsy. | |||
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The fact that static images may cause seizures and other disorders is documented in articles such as ["Gamma Oscillations and photosensitive epilepsy"](https://doi.org/10.1016/j.cub.2017.03.076), where it is noted "_Certain visual images, even in the absence of motion or flicker, can trigger seizures in patients with photosensitive epilepsy_". The Epilepsy Foundation, in its article, ["Shedding Light on Photosensitivity, One of Epilepsy's Most Complex Conditions"](https://www.epilepsy.com/article/2014/3/shedding-light-photosensitivity-one-epilepsys-most-complex-conditions-0) talks about static images and patterns: "_Static or moving patterns of discernable light and dark stripes have the same effect as flashing lights because of the alternation of dark and bright areas."_ The Epilepsy Foundation of America Working Group is able to "quantify" the problem a little: _"A pattern with the potential for provoking seizures contains clearly discernible stripes, numbering more than five light-dark pairs of stripes in any orientation_". In addition to stripes, checkered patterns have also been known to cause photosensitive seizures, according to [Cedars-Sinai](https://www.cedars-sinai.edu/Patients/Health-Conditions/Photosensitive-Seizures.aspx). | |||
The fact that static images may cause seizures and other disorders is documented in articles such as ["Gamma Oscillations and photosensitive epilepsy"](https://linkinghub.elsevier.com/retrieve/pii/S0960982217304062), where it is noted "_Certain visual images, even in the absence of motion or flicker, can trigger seizures in patients with photosensitive epilepsy_". The Epilepsy Foundation, in its article, ["Shedding Light on Photosensitivity, One of Epilepsy's Most Complex Conditions"](https://www.epilepsy.com/stories/shedding-light-photosensitivity-one-epilepsys-most-complex-conditions-0) talks about static images and patterns: "_Static or moving patterns of discernable light and dark stripes have the same effect as flashing lights because of the alternation of dark and bright areas."_ The Epilepsy Foundation of America Working Group is able to "quantify" the problem a little: _"A pattern with the potential for provoking seizures contains clearly discernible stripes, numbering more than five light-dark pairs of stripes in any orientation_". In addition to stripes, checkered patterns have also been known to cause photosensitive seizures, according to [Cedars-Sinai](https://www.cedars-sinai.org/health-library/diseases-and-conditions/p/photosensitive-seizures.html). |
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Suggested change
The fact that static images may cause seizures and other disorders is documented in articles such as ["Gamma Oscillations and photosensitive epilepsy"](https://linkinghub.elsevier.com/retrieve/pii/S0960982217304062), where it is noted "_Certain visual images, even in the absence of motion or flicker, can trigger seizures in patients with photosensitive epilepsy_". The Epilepsy Foundation, in its article, ["Shedding Light on Photosensitivity, One of Epilepsy's Most Complex Conditions"](https://www.epilepsy.com/stories/shedding-light-photosensitivity-one-epilepsys-most-complex-conditions-0) talks about static images and patterns: "_Static or moving patterns of discernable light and dark stripes have the same effect as flashing lights because of the alternation of dark and bright areas."_ The Epilepsy Foundation of America Working Group is able to "quantify" the problem a little: _"A pattern with the potential for provoking seizures contains clearly discernible stripes, numbering more than five light-dark pairs of stripes in any orientation_". In addition to stripes, checkered patterns have also been known to cause photosensitive seizures, according to [Cedars-Sinai](https://www.cedars-sinai.org/health-library/diseases-and-conditions/p/photosensitive-seizures.html). | |
The fact that static images may cause seizures and other disorders is documented in articles such as ["Gamma Oscillations and photosensitive epilepsy"](https://www.cell.com/current-biology/fulltext/S0960-9822(17)30406-2), where it is noted "_Certain visual images, even in the absence of motion or flicker, can trigger seizures in patients with photosensitive epilepsy_". The Epilepsy Foundation, in its article, ["Shedding Light on Photosensitivity, One of Epilepsy's Most Complex Conditions"](https://www.epilepsy.com/stories/shedding-light-photosensitivity-one-epilepsys-most-complex-conditions-0) talks about static images and patterns: "_Static or moving patterns of discernable light and dark stripes have the same effect as flashing lights because of the alternation of dark and bright areas."_ The Epilepsy Foundation of America Working Group is able to "quantify" the problem a little: _"A pattern with the potential for provoking seizures contains clearly discernible stripes, numbering more than five light-dark pairs of stripes in any orientation_". In addition to stripes, checkered patterns have also been known to cause photosensitive seizures, according to [Cedars-Sinai](https://www.cedars-sinai.org/health-library/diseases-and-conditions/p/photosensitive-seizures.html). |
@@ -507,12 +507,12 @@ A very old article, Tech Republic's ["Epilepsy and CRT/LCD screen flicker"](http | |||
- _"This effect is noticeable, and documented, up to 70 Hz."_ | |||
- _"These studies would seem to indicate that you should stay away from refresh rates under 70 Hz, and use a rate not divisible by 10."_ | |||
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Eric Bailey, of CSS-Tricks, found an innovative use the update feature which, used in combination with animation-duration or transition-duration, to conclude at a rate that is imperceptible to the human eye. In other words, Eric's techniques address the refresh-rate problem. The CSS below is from the CSS-Tricks article, [" Revisiting prefers-reduced-motion, the reduced motion media query"](https://css-tricks.com/revisiting-prefers-reduced-motion-the-reduced-motion-media-query/). | |||
Eric Bailey, of CSS-Tricks, found an innovative use the update feature which, used in combination with animation-duration or transition-duration, to conclude at a rate that is imperceptible to the human eye. In other words, Eric's techniques address the refresh-rate problem. The CSS below is from the CSS-Tricks article, [" Revisiting prefers-reduced-motion, the reduced motion media query"](https://css-tricks.com/revisiting-prefers-reduced-motion/). |
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Suggested change
Eric Bailey, of CSS-Tricks, found an innovative use the update feature which, used in combination with animation-duration or transition-duration, to conclude at a rate that is imperceptible to the human eye. In other words, Eric's techniques address the refresh-rate problem. The CSS below is from the CSS-Tricks article, [" Revisiting prefers-reduced-motion, the reduced motion media query"](https://css-tricks.com/revisiting-prefers-reduced-motion/). | |
Eric Bailey, of CSS-Tricks, found an innovative use the update feature which, used in combination with animation-duration or transition-duration, to conclude at a rate that is imperceptible to the human eye. In other words, Eric's techniques address the refresh-rate problem. The CSS below is from the CSS-Tricks article, ["Revisiting prefers-reduced-motion, the reduced motion media query"](https://css-tricks.com/revisiting-prefers-reduced-motion/). |
teoli2003
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May 12, 2022
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Extending #14055
Summary
Updates redirected URLs.