Does our eyes have any other ways of controlling the intake/absorption of light besides the aperture of the pupils?

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In addition: does the change in the pupil size affect the way we perceive depth of field?

In: Biology

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Anonymous 0 Comments

Yes they do. In fact the aperture of the pupils is a relatively small factor in how the eyes adjust to brightness.

The main mechanism is the conversion of the substance rhodopsin to the substances retinal and opsin (and then back to rhodopsin). Unlike the pupil size change, the chemical change can take a few minutes, which is why it takes a while for us to adjust after a sudden change from light to dark or dark to light.

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