# What causes your eyes to change?

**URL:** <https://boards.straightdope.com/t/what-causes-your-eyes-to-change/175023>\
**Category:** Factual Questions\
**Created:** [May 13, 2003, 7:41pm UTC](https://boards.straightdope.com/t/what-causes-your-eyes-to-change/175023 "2003-05-13T19:41:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Neil](https://avatars.discourse-cdn.com/v4/letter/n/839c29/32.png) [@Neil](https://boards.straightdope.com/u/Neil)\
**Post date:** [May 13, 2003, 7:41pm UTC](https://boards.straightdope.com/t/what-causes-your-eyes-to-change/175023/1 "2003-05-13T19:41:31Z")

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After an optometrist appointment today, I got a slightly new presciption for my contact lenses. This made me start to wonder- what causes this to change? I’m only 20, so maybe stuff is still changing in my body a little bit, but is there anything someone might do that would affect their vision negatively or positively? (Like parents claiming that staring at a TV or computer screen will ruin your eyesight, etc).

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**Author:** ![Ale](https://avatars.discourse-cdn.com/v4/letter/a/f19dbf/32.png) [@Ale](https://boards.straightdope.com/u/Ale)\
**Post date:** [May 14, 2003, 3:24am UTC](https://boards.straightdope.com/t/what-causes-your-eyes-to-change/175023/2 "2003-05-14T03:24:33Z")

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Forcing your eyes to focus on near objects (like a computer screen) for an extended period of time will induce permanent curvature changes on the crystalline lens. It´s an adaptation of your eyes to your lifestyle.  
There are of course other causes for that, but this one seems to fit your case better.

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**Author:** ![clayton\_e](https://avatars.discourse-cdn.com/v4/letter/c/c57346/32.png) [@clayton\_e](https://boards.straightdope.com/u/clayton_e)\
**Post date:** [May 14, 2003, 4:30am UTC](https://boards.straightdope.com/t/what-causes-your-eyes-to-change/175023/3 "2003-05-14T04:30:40Z")

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Ah Ha!

I knew I wasn’t hurting my eyesight! I’m only adapting to a lifestyle I’ll have for the rest of my life… Sitting in front of a computer… probably doing nothing productive… a pape…er… e-mail pusher.

Seriously thinking of becoming a hermit.