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प्रश्न
Five persons A, B, C, D and E have diabetes, leukaemia, asthma, meningitis and hepatitis, respectively.
Which of these persons cannot donate eyes?
उत्तर
Persons with diabetes (A), leukaemia (B), meningitis (D) or hepatitis (E) cannot donate their eyes.
Meningitis and hepatitis are infectious diseases whereas leukaemia is a type of blood cancer and is communicable. Diabetic patients also cannot donate their eyes.
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संबंधित प्रश्न
Out of rods and cones m the retina of your eye:
which detect colour?
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
fill in the following blank with suitable word:
A person is short-sighted if his eyeball is too............Spectacles with a .............lens are needed. A person is long-sighted if his eyeball is too............Spectacles with a ................lens are needed. These focus light rays exactly on to the..........
The region in the eyes where the rods and cones are located is the
Name the following:
The photoreceptors found in the retina of the eye.
Give the main function of the following:
Lachrymal glands
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
State the Location:
Iris
We cannot distinguish colours in dim light. Explain giving suitable reasons.
The transparent membrane that keeps the eye moist is ______.
