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Author Topic: Why do we see blotches after looking at lights?  (Read 2609 times)

George Pope

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Why do we see blotches after looking at lights?
« on: 15/03/2011 17:52:24 »
George Pope  asked the Naked Scientists:

   

Why is it that when you look into any type of light for a long period of time that blotches of black appear when you look away?



What do you think?
« Last Edit: 15/03/2011 17:52:24 by _system »

RD

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Ashia

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« Reply #2 on: 05/11/2014 02:44:57 »
What does it mean when the blotches last unusually long and/or are triggered by relatively dim flashes (ie:the shine off of a clean car or a traffic light).

RD

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Re: Why do we see blotches after looking at lights?
« Reply #3 on: 05/11/2014 04:52:14 »
What does it mean when the blotches last unusually long and/or are triggered by relatively dim flashes (ie:the shine off of a clean car or a traffic light).

Drugs (prescribed or "street") or disease which delays/restricts pupils constricting could be responsible ...

Light streaking
Light streaking describes a comet-like tail which is seen due to motion between a person or a light. The streaking usually persists for several seconds before fading and often occurs with bright lights on a dark background. Patients commonly report of difficulty with night driving since the headlights of oncoming cars cause multiple streaks which obscure vision.
http://en.wikipedia.org/wiki/Illusory_palinopsia#Light_streaking
« Last Edit: 05/11/2014 04:56:57 by RD »

 

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