Advertisements
Advertisements
Question
The figure below compares a part of our eye with a part of a photographic camera.
Explain the mode of working and the functions of the parts of the eye mentioned above.
Solution
The cornea is the eye's main focusing element. It takes widely diverging rays of light and bends them through the pupil; the rays are further converged by the lens.
APPEARS IN
RELATED QUESTIONS
Write the function of retina in human eye.
Explain the following:
Mechanism of generation of light-induced impulse in the retina.
Differentiate between: Rods and cones
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
How does the eye change in order to focus on near or distant objects?
(a) The lens moves in or out
(b) The retina moves in or out
(c) The lens becomes thicker or thinner
(d) The pupil gets larger or smaller
What shape are your eye-lenses:
when you look at your hand?
A man driving a car can read a distant road sign clearly but finds difficulty in reading the odometer on the dashboard of the car. Which of the following statement is correct about this man?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come closer to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Name two animals having eyes:
one the sides of the head.
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 following:
White part of the eye.
Name the respective organs in which the following are located and mention the main function of each:
(i) Iris
(ii) Semicircular canals
Give the main function of the following:
Three semicircular canals
Choose the Odd One Out:
Write an Explanation.
Power of accommodation
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?
Which of the following statements is correct regarding rods and cones in the human eye?
Name the part of the eye which gives colour to the eyes.
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.
Choroid
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
