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प्रश्न
Write the name.
The fleshy screen behind cornea.
उत्तर
The fleshy screen behind cornea- Iris
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संबंधित प्रश्न
How does the eye regulate the amount of light that falls on the retina?
Which. of the following has normal vision?
(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Are these lenses thinner at the middle or at the edges?
Where does the greatest degree of refraction of light occur in the eye?
Name the part of our eyes which helps us to focus near and distant objects in quick succession.
Which of the following controls the amount of light entering the eye?
(a) ciliary muscles
(b) lens
(c) iris
(d) cornea
The size of the pupil of the eye is adjusted by:
(a) cornea
(b) ciliary muscles
(c) optic nerve
(d) iris
Which parts of the eye cause rays of light to converge on the retina?
A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come close to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Fill in the following blank with suitable word:
Having two eyes enables us to judge.................more accurately.
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
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.
Short-sightedness and hyperopia are one and the same thing
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during distant vision?
With reference to the functioning of the eye, answer the question that follow:
Name the cells of the retina and its respective pigments which get activated in the light.
The figure below compares a part of our eye with a part of a photographic camera.
Name the corresponding parts of the eye the camera shown here that are comparable in function.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The part of the eye which can be donated from a clinically dead person is the Retina.
Name the respective organs in which the following are located and mention the main function of each:
(i) Iris
(ii) Semicircular canals
Write whether the following is true or false:
Rods are the receptor cells in the retina of the eye sensitive to dimlight.
Name the following:
The opening through which light enters the eyes.
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Name the following:
The innermost layer of the eye
Name the following:
Fluid present in the posterior chamber of the eye.
Give Technical Term:
The cells of the retina that are sensitive to colour.
Complete the following sentence with appropriate Word
The part of the human eye where rod cells and cone cells are located is the:
Complete the following sentence with appropriate Word
The photoreceptor cells of the retina sensitive to colour are:
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.
Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?
What is ‘white of the eye’?
Select the option with incorrect identification:
With reference to human eye, answer the following question.
What is aqueous humor?
With neat, labeled diagram describe the structure of retina of eye.
Given below is a cross section of the human eye. Match the structures marked (a) to (e) with their correct functions:
Example: (f) - 6. Holds the lens in position
| Cross section of Human Eye | Functions | |
 |
1. | Protects retina |
| 2. | Regulates the size of the pupil | |
| 3. | Alters the shape of the lens | |
| 4. | Keeps the lens moist | |
| 5. | Transmits nerve impulses to brain | |
| 6. | Holds the lens in position |
With reference to human eye answer the question that follow:
Name the part of the eye associated with keeping the lens moist and protecting it from physical shock.
