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The eye uses both the pupil and iris to control how much light enters the visual receptors. here is a source to read more: http://www.biologymad.com/NervousSystem/eyenotes.htm
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The is the colored part of the eye that narrows and widens to control the amount of light entering the eye?
The colored portion that regulates the amount of light in eye is called as iris. The hole through which light passes inside the posterior chamber is called as is called as pupil. The color of the iris changes as per color of the skin pigment. It has got circular muscles and radial muscles in it. In fight or flight responce, it is dilated through sympathetic nerve stimulation. In relaxed and stress free envirinment pupil is constricted via parasympathetic nerve stimulation.
How does the iris control how much light enters the eye?
The iris is the coloured membrane in the eye that controls the amount of light entering the eye by expanding and contracting. The pupil is a hole in the centre of the iris. By expanding, more light will enter the pupil and by contracting less light will enter the pupil.http://en.wikipedia.org/wiki/Iris_(anatomy)
When a light is shone into one eye what happens to the pupil of the other eye?
The eyes constrict, not dilate, when a light is shone into the eye...this is a multi-arc process going through the parasympathetic nervous system and the EW nucleus.
What part of the eye allows light to enter?
The pupil is the part of the eye through which light passes.
How does light enter the eye?
As light enters the eye, it strikes the receptor cells of the retina, called the rods and cones.
What do pupils control?
amount of light entering eye
Does the lens of the eye control the amount of light that strikes the retina?
False :)
Does the pupil absorb the light?
The pupil is actually the absence of the iris (colored part of the eye), so it only allows light to pass through it and helps control how much light passes to the back of the eye.
How does the iris control the the amount of light reaching the pupils?
The iris dilates in dimmer light to allow more light into the eye through the pupil then lens, through the inner eye onto the retina, and finally to the optical nerve. The iris will contract when lots of light is exposed to the eye to allow less light into the eye, so we are not blinded. Sources: My science teacher in 5th grade. :)
What is the light-sensitive inner layer of the eye?
The retina converts light to electric signals used by the occipital cortex of your brain, that is sight. The iris is the black looking part of your eye the expands and contracts to control the amount of light reaching your retina.
How is the aperture of the camera like the pupil of an eye?
The aperature can control the amount of light that comes into the camera just like the pupil of the eye.
The is the colored part of the eye that narrows and widens to control the amount of light entering the eye?
The colored portion that regulates the amount of light in eye is called as iris. The hole through which light passes inside the posterior chamber is called as is called as pupil. The color of the iris changes as per color of the skin pigment. It has got circular muscles and radial muscles in it. In fight or flight responce, it is dilated through sympathetic nerve stimulation. In relaxed and stress free envirinment pupil is constricted via parasympathetic nerve stimulation.
How does the iris control the size of the pupil?
the iris
How does the human eye respond to energy?
We see out of the eye because of the light that's hits the eye and the light that we see it sends a signal to the brain and then we can see the picture.
What does the iris of the human eye do when the light is bright?
The Iris controls the size of the pupil to control the brightness of the light that's allowed to enter the eye. This is a protective measure when the light is too bright and it also opens the iris in low light situations to allow the eye to see more. Well, the iris changes the size of the pupil so when you are in bright light your pupil will get smaller because the eye will absorb all light striking it. However, when you are in a dark room or place your pupil will get bigger/wider because it has no light to absorb it so your eye wants light. For example think of the pupil trying to look for light so it has to get wider!
How does the iris control how much light enters the eye?
The iris is the coloured membrane in the eye that controls the amount of light entering the eye by expanding and contracting. The pupil is a hole in the centre of the iris. By expanding, more light will enter the pupil and by contracting less light will enter the pupil.http://en.wikipedia.org/wiki/Iris_(anatomy)
What opening lets light into the eye?
The pupil lets light into the eye.
