What is the power of accommodation? How do the ciliary muscles achieve this ?
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The ability of the eye to adjust its focal length so as to see the object located anywhere is called power of accommodation.
When the eye looks at the distance object, the ciliary muscle attached to the lens of the eye relax and the lens become thinner and hence the focal length of the eye increases. And when we looks at the nearby object the ciliary
muscle attached to the lens of the eye contract and the lens become thicker, so we can see the object.
This ability of the eye to adjust its focal length, is called power of accommodation.
When the eye looks at the distance object, the ciliary muscle attached to the lens of the eye relax and the lens become thinner and hence the focal length of the eye increases. And when we looks at the nearby object the ciliary
muscle attached to the lens of the eye contract and the lens become thicker, so we can see the object.
This ability of the eye to adjust its focal length, is called power of accommodation.
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Power of Accomodation
The ability of an eye to see object from infinity (far point) upto 25 cm (near point) is called "Power of Accomodation" or the ability of the eye lens to adjust its focal length is called Power of Accomodation.
Working of The Eye
When rays of light coming from an object enter into the pupil of the eye and falls on the eye lens, it converges the light rays and produces a real and inverted image of the object on the retina. The image formed on retina is conveyed to brain by the optic nerve and give rise to the sensation of vision.
Working of Ciliary Muscles
If an object is at infinity, parallel beam of light enters the eye and in this condition eye is least strained and said to be 'relaxed' or 'unstrained'.
If an object is at least distance of distinct vision (near point), eye is under maximum strain and visual angle is maximum.
Hope this helps you.....:)
The ability of an eye to see object from infinity (far point) upto 25 cm (near point) is called "Power of Accomodation" or the ability of the eye lens to adjust its focal length is called Power of Accomodation.
Working of The Eye
When rays of light coming from an object enter into the pupil of the eye and falls on the eye lens, it converges the light rays and produces a real and inverted image of the object on the retina. The image formed on retina is conveyed to brain by the optic nerve and give rise to the sensation of vision.
Working of Ciliary Muscles
If an object is at infinity, parallel beam of light enters the eye and in this condition eye is least strained and said to be 'relaxed' or 'unstrained'.
If an object is at least distance of distinct vision (near point), eye is under maximum strain and visual angle is maximum.
Hope this helps you.....:)
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