The white outer coating of the eye is called the sclerotic. The sclerotic is responsible for protecting the inner eye as well as giving the eye shape. The cornea is the transparent part of the sclerotic that allows light into the eye.
Just behind the cornea lies the Iris. The iris acts like a cameraas shutter, controlling the size of the pupil to regulate the amount of light to enter the eye. The eye lens, a double convex lens, helps the eye to form an image in the retina by refracting 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.
Aqueous Humour:-The space between cornea and eye lens is filled with transparent fluid called aqueous humour. Blind Spot:- The region of eye containing the optic nerve is not at all sensitive to light and is called blind spot. If the image of an object is formed in the blind spot, it is not visible. Vitreous Humour:- The space between eye lens and retina is filled with a transparent jelly like transparent fluid called VitreousHumour.
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.
Lying on the optical axis, the yellow spot is the part of the retina that is most light-sensitive. Eyelids are used to control the amount of light that enters the eye as well as serving as protection for the eye against dust and other external particles.
The human eye can focus on various objects at various distances. This is done by altering the power of the lens and is called the power of accommodation of the eye. Ciliary muscles also play a role in this ability as they change both the focal length and the curvature of the eye. This helps form clear retinal images of objects at various distances despite the fixed nature of the distance between the optical center of the lens and the retina.
Defects of eye Vision:- MYOPIA A person having this defect can see objects at short distance cearly and cannot see the distant object. This defect is called Myopia HYPERMETROPIA:- A person having this defect can see the distant objects clearly but cannot see the near objects clearly. This defect is called Hypermetropia.
Just behind the cornea lies the Iris. The iris acts like a cameraas shutter, controlling the size of the pupil to regulate the amount of light to enter the eye. The eye lens, a double convex lens, helps the eye to form an image in the retina by refracting 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.
Aqueous Humour:-The space between cornea and eye lens is filled with transparent fluid called aqueous humour. Blind Spot:- The region of eye containing the optic nerve is not at all sensitive to light and is called blind spot. If the image of an object is formed in the blind spot, it is not visible. Vitreous Humour:- The space between eye lens and retina is filled with a transparent jelly like transparent fluid called VitreousHumour.
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.
Lying on the optical axis, the yellow spot is the part of the retina that is most light-sensitive. Eyelids are used to control the amount of light that enters the eye as well as serving as protection for the eye against dust and other external particles.
The human eye can focus on various objects at various distances. This is done by altering the power of the lens and is called the power of accommodation of the eye. Ciliary muscles also play a role in this ability as they change both the focal length and the curvature of the eye. This helps form clear retinal images of objects at various distances despite the fixed nature of the distance between the optical center of the lens and the retina.
Defects of eye Vision:- MYOPIA A person having this defect can see objects at short distance cearly and cannot see the distant object. This defect is called Myopia HYPERMETROPIA:- A person having this defect can see the distant objects clearly but cannot see the near objects clearly. This defect is called Hypermetropia.
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