What role does the iris play in the vertebrate eye?

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It controls the amount of light entering the eye.

  

It contains light-sensitive cells that send signals to the brain to process the visual image.

  

It focuses light on the retina.

  

It is the opening through which light passes into the eye.

 

asked Jan 1, 2013 in Biology by anonymous
    

1 Answer

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It controls the amount of light entering the eye.

 

answered Jan 1, 2013 by anonymous

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