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प्रश्न
A person got his eyes tested. The optician's prescription for the spectacles reads:
Left eye: − 3.00 D
Right eye: − 3.50 D
The person is having a defect of vision called:
(a) presbyopia
(b) myopia
(c) astigmatism
(d) hypermetropia
उत्तर
myopia
The optician has prescribed concave lenses for the person's spectacles, as a concave lens decreases the converging power of the eye lens. This shows that the person is suffering from short-sightedness, or myopia.
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संबंधित प्रश्न
After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles:
Left eye : + 2.00 D
Right eye : + 2.25 D
The child is suffering from the defect of vision called:
(a) short-sightedness
(b) long-sightedness
(c) cataract
(d) presbyopia
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
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.
Answer the following question.
Trace the sequence of events Whichoccur when a bright light is focused on your eyes.
What is a Lachrymal gland?
State the Location of:
Lacrimal gland
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?
Describe the parts in the external structure of the eye.
Write the main functional activity of the following structure.
Choroid
With reference to human eye answer the question that follow:
Name the part of the eye associated with the layer providing nourishment to the eye.
