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प्रश्न
Write the name.
The part of human eye that transmits electrical signals to the brain.
उत्तर
The part of human eye that transmits electrical signals to the brain- Optic nerve
संबंधित प्रश्न
Write the function of retina in human eye.
Define the term.
Power of accommodation of the eye.
Compare the following: Choroid and retina
Answer briefly:
How do you perceive the colour of an object?
The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the
(a) fovea
(b) iris
(c) blind spot
(d) optic chaisma
What job does the pupil of the eye do?
Where does the greatest degree of refraction of light occur in the eye?
Define the term "power of accommodation" of human eye.
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
Fill in the following blank with suitable word:
The part of eye sensitive to light is...................
Fill in the following blank with suitable word:
The part of eye which alters the size of the pupil is............
Fill in the following blank with suitable word:
The iris controls the amount of................entering the eye.
Fill in the following blank with suitable word:
To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made..........
How does the convex eye-lens differ from the ordinary convex lens made of glass?
List, in order, the parts of the eye through which light passes to reach the retina.
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.
Explain why, we cannot see our seats first when we enter a darkened cinema hall from bright light but gradually they become visible.
Refraction of light in the eye occurs at:
(a) the lens only
(b) the cornea only
(c) both the cornea and the lens
(d) the pupil
When is a person said to have developed cataract in his eye? How is the vision of a person having cataract restored?
How much is our field of view:
with both eyes open?
Explain clearly why, a person who has lost the sight of one eye is at a disadvantage compared with the normal person who has two good eyes.
Given below is a set of five parts. Rewrite them in correct sequence.
Conjunctiva, retina, cornea, optic nerve, lens.
Name the muscles of the eye responsible for the power of accommodation.
State the function of each of the following parts of the human eye:
(i) Cornea
(ii) Iris
(iii) Pupil
(iv) Retina
Millions of people of the developing countries are suffering from corneal blindness. This disease can be cured by replacing the defective cornea with the cornea of a donated eye. Your school has organised a campaign in the school and its neighbourhood in order to create awareness about this fact and motivate people to donate their eyes after death. How can you along with your classmates contribute in this noble cause? State the objectives of organising such campaigns in schools.
State the main functions of the following:
Coronary Artery
Select the odd one in the following series:
Retina, Sclera, Ciliary body, Nephron.
Define the following:
Yellow spot
Give the main function of the following:
Three semicircular canals
Name the following:
The opening through which light enters the eyes.
Choose the correct answer.
Which one is the photoreceptor _____________
Name the following:
Fluid present in the posterior chamber of the eye.
Choose the Odd One Out:
Long answer question
Draw the neat labelled diagram of the Sectional view of the human eye.
Write scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
Given below is a diagram depicting a defect of the human eye. Answer the questions that follow:
- Give the scientific term for the defect.
- Mention one possible reason for the defect.
- What type of lens can be used to correct the defect?
The transparent membrane that keeps the eye moist is ______.
