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प्रश्न
Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances
उत्तर
Accommodation of eye
APPEARS IN
संबंधित प्रश्न
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Which lens has a greater focal length?
Name the part of the eye:
which changes the focal length of eye-lens.
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
Give the scientific names of the following parts of the eye:
changes shape to focus a picture on the retina.
The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case:
the focal length of eye-lens will be the maximum?
How does this affect the amount of light entering the eye?
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.
The human eye possesses the power of accommodation. This is the power to:
(a) alter the diameter of the pupil as the intensity of light changes
(b) distinguish between lights of different colours
(c) focus on objects at different distances
(d) decide which of the two objects is closer.
Name the following:
The part of the eye responsible for its shape.
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.
Ciliary muscles regulate the size of the pupil
Given below is a set of five parts. Rewrite them in correct sequence.
Conjunctiva, retina, cornea, optic nerve, lens.
State the main functions of the following:
Coronary Artery
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
What are the functions of tears?
Choose the Odd One Out:
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.
In a relaxed state, the focal length of healthy eyes is _______.
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
