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© Science Photo Library

Dilation and contraction of the pupil of the eye in response to changing light levels. The aperture of the pupil is controlled by the muscles of the iris, the coloured region surrounding the eye.

By Science Photo Library

Stock Footage ID: D30_4_293
Clip length: 00:07
Frame rate: 25.0 fps
Original codec: M-JPEG
Chevron down solid (1) 44418925730c8c634a02a86ad6930977f909e8f2763599fa18c8df08b2f11a07

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