The outermost coating of the human eye is called the sclerotic. White in color, the purpose of this coating is to protect the interior parts of the eye and give the eye its shape. The cornea, a part of the sclerotic, is transparent and responsible for allowing light into the eye.
Iris:- Iris is just at the back of the cornea this control the size of pupil. It acts like a shutter of a photographic camera and allow the regulated amount of light to enter the eye. Eye lens:- Eye lenns is a double convex lenns with the help of which image image is formerd at retina by refraction of light .
Ciliary muscles are responsible for holding the eye lens in place. These muscles also help the eye change focal length. The pupil is essentially a hole in the center of the iris that allows light to reach through to the lens.
A transparent fluid fills the space between the cornea and the eye lens. This fluid is called the aqueous humour. The eye also has a blind spot, the region containing the optic nerve, which is not sensitive to light. Images formed in the blind spot are not visible. A transparent jelly called the vitreous humour fills the space between the eye lens and the retina.
Made up of light sensitive cell located at the back of the eye lens, the retina serves as the eyeas screen. It is here that images are formed before being sent to the brain by the optic nerve. The optical system of the eyeas principal axis is the dotted line XY axis.
The yellow spot is the most light-sensitive part of the retina. It lies on the optical axis. Eye lids are primarily used to protect the eye from external particles and limit the amount of light that falls on the eyes.
Power Of Accomodation Of Eye:- Our eye can see the objects which are far away as well as near to it. The propert of the eye that enable the eye to accomodate on the various objects at various distance by altering the power the power of eye lens is called its power of accomodation. Image of the object is formed at retina. The distance between the optical center of the lens and retina is fixed. Ciliary muscles change the focal length of the eye lens by changing its curvature. Therefore the image of the objects situated at the different distances are formed clearly at the retina.
The eye can have various defects. One of these is Myopia. Myopia is present when a person cannot see distant objects clearly. Close objects, however, remain clear. Another defect is known as Hypermetropia which is the opposite. Someone with Hypermetropia can see distant objects clearly but struggle focusing on close objects.
Iris:- Iris is just at the back of the cornea this control the size of pupil. It acts like a shutter of a photographic camera and allow the regulated amount of light to enter the eye. Eye lens:- Eye lenns is a double convex lenns with the help of which image image is formerd at retina by refraction of light .
Ciliary muscles are responsible for holding the eye lens in place. These muscles also help the eye change focal length. The pupil is essentially a hole in the center of the iris that allows light to reach through to the lens.
A transparent fluid fills the space between the cornea and the eye lens. This fluid is called the aqueous humour. The eye also has a blind spot, the region containing the optic nerve, which is not sensitive to light. Images formed in the blind spot are not visible. A transparent jelly called the vitreous humour fills the space between the eye lens and the retina.
Made up of light sensitive cell located at the back of the eye lens, the retina serves as the eyeas screen. It is here that images are formed before being sent to the brain by the optic nerve. The optical system of the eyeas principal axis is the dotted line XY axis.
The yellow spot is the most light-sensitive part of the retina. It lies on the optical axis. Eye lids are primarily used to protect the eye from external particles and limit the amount of light that falls on the eyes.
Power Of Accomodation Of Eye:- Our eye can see the objects which are far away as well as near to it. The propert of the eye that enable the eye to accomodate on the various objects at various distance by altering the power the power of eye lens is called its power of accomodation. Image of the object is formed at retina. The distance between the optical center of the lens and retina is fixed. Ciliary muscles change the focal length of the eye lens by changing its curvature. Therefore the image of the objects situated at the different distances are formed clearly at the retina.
The eye can have various defects. One of these is Myopia. Myopia is present when a person cannot see distant objects clearly. Close objects, however, remain clear. Another defect is known as Hypermetropia which is the opposite. Someone with Hypermetropia can see distant objects clearly but struggle focusing on close objects.
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