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प्रश्न
Write the name.
The screen with light sensitive cells in human eye.
उत्तर
The screen with light sensitive cells in human eye- Retina
APPEARS IN
संबंधित प्रश्न
Match the following:
| Column I | Column II |
| (i) Myopia | (a) Converging power of eye lens becomes low |
| (ii) Hypermetropia | (b) Converging power of eye lens remains the same |
| (c) Converging power of eye lens becomes high |
What job does the pupil of the eye do?
What do the ciliary muscles do when you are focusing on a nearby object?
What is the range of vision of a normal human eye?
Why does it take some time to see objects in a dim room when you enter the room from bright sunshine outside?
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
How does this affect the amount of light entering the eye?
There are two types of light-sensitive cells in the human eye:
Where are they found?
List, in order, the parts of the eye through which light passes to reach the retina.
How does the eye adjust itself to deal with light of varying intensity?
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
fill in the following blank with suitable word:
A person is short-sighted if his eyeball is too............Spectacles with a .............lens are needed. A person is long-sighted if his eyeball is too............Spectacles with a ................lens are needed. These focus light rays exactly on to the..........
How much is our field of view:
with both eyes open?
Name two animals having eyes:
at the front of the head.
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
Mention if the following statement is true (T) or false (F) Give reason.
Sometimes medicines dropped into the eyes come into the nose and even throat
Mention if the following statement is true (T) or false (F) Give reason.
Blind spot is called so because no image is formed on it.
Mention the characteristics of the image that falls on the retina of the eye.
Label the following diagram :
The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?
Differentiate between:
Yellow spot and Blind spot.
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
Name the following:
The area where the image is formed but not seen by our eye is termed as.
Name the following:
The region in the eye where the rods and cones are located.
State the Location of:
Lacrimal gland
Choose the Odd One Out:
Complete the following sentence with appropriate Word
The part of the human eye where rod cells and cone cells are located is the:
Draw a scientifically correct labelled diagram of a human eye and answer the questions based on it:
- Name the type of lens in the human eye.
- Name the screen at which the maximum amount of incident light is refracted?
- State the nature of the image formed of the object on the screen inside the eye.
Assertion: Blind spot is a small area of the retina which is insensitive to light where the optic nerve leaves the eye.
Reason: There are no rods or cones present at the junction of the optic nerve and retina in the eye.
The pigmented circular area seen in front of the eye:
What kind of lens is there in our eyes? Where does it form the image of an object?
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
With neat, labeled diagram describe the structure of retina of eye.
Vitreous humour is present between ______.
Explain the role of the part of human eye responsible for power of accommodation of human eye.
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
Name the following:
Three layers of the eye ball.
