# What happens to light after it enters the eye?

**URL:** <https://boards.straightdope.com/t/what-happens-to-light-after-it-enters-the-eye/599713>\
**Category:** Factual Questions\
**Created:** [October 15, 2011, 4:23am UTC](https://boards.straightdope.com/t/what-happens-to-light-after-it-enters-the-eye/599713 "2011-10-15T04:23:34Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![Becky2844](https://avatars.discourse-cdn.com/v4/letter/b/91b2a8/32.png) [@Becky2844](https://boards.straightdope.com/u/Becky2844)\
**Post date:** [October 18, 2011, 12:35pm UTC](https://boards.straightdope.com/t/what-happens-to-light-after-it-enters-the-eye/599713/21 "2011-10-18T12:35:58Z")

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> [@njtt](#):
>
> Like all of your body, your eyeball is warm, and so will emit a small amount of heat. I do not believe that a stroke could cause your eye to emit more heat (or moisture) than usual. That will not have been the cause of the ‘fog’ that you experienced. It seems much more likely that the experience of fogginess was actually the result of a problem with the visual processing in your brain, caused by your stroke.

No, it was an actual smear that I had to wipe off several times a day. In the upper center of my right lens. And only that side, tho I now have “right field defect” in both eyes. 😕

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**Author:** ![chorpler](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chorpler/32/2888_2.png) [@chorpler](https://boards.straightdope.com/u/chorpler)\
**Post date:** [October 18, 2011, 11:52pm UTC](https://boards.straightdope.com/t/what-happens-to-light-after-it-enters-the-eye/599713/22 "2011-10-18T23:52:09Z")

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Very peculiar, **Becky2844**. Perhaps your right eye was tearing up more as a result of the vision damage?

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**Author:** ![Becky2844](https://avatars.discourse-cdn.com/v4/letter/b/91b2a8/32.png) [@Becky2844](https://boards.straightdope.com/u/Becky2844)\
**Post date:** [October 19, 2011, 3:40am UTC](https://boards.straightdope.com/t/what-happens-to-light-after-it-enters-the-eye/599713/23 "2011-10-19T03:40:21Z")

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Don’t know. There wasn’t any excess tearing tho (in fact, I’ve always had what’s known as “dry eyes.” Cried my first tear when I was in the 7th grade.) It was the _upper_ center. But I’ve always trusted my body so it must have served a purpose. The doctors didn’t know either.

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