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प्रश्न
Name the following:
The circular opening enclosed by iris.
उत्तर
Pupil
संबंधित प्रश्न
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads :
Left eye : +2.50 D
Right eye : +2.00 D
Which lens bends the light rays more strongly?
Name two types of cells in the retina of an eye which respond to light.
What changes take place in the shape of eye-lens:
when the eye is focused on a distant object?
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 converging power of eye-lens will be the maximum?
What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams.
What happens to the size of pupil of our eye (i) in dim light (ii) in bright light?
What is a lacrimal gland?
Write whether the following is true or false:
Rods are the receptor cells in the retina of the eye sensitive to dimlight.
Differentiate between:
Yellow spot and Blind spot.
Mention, if the following statement is True or False
The least distance of distinct vision for the human eye is 25 cm
State the Function:
Visual purple
State the Function:
Vitreous humour
A small hole of changing diameter at the centre of Iris is called _______.
Write scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
Explain the structure and functioning of Human eye. How are we able to see nearby as well as distant objects?
Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
Arrange and rewrite the term in group in correct order to be in a logical sequence, beginning with the term that is underlined:
Pupil, Aqueous humour, Retina, Vitreous humour.
State the functions of the following:
Iris
