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Distinguish Between the Following Pair of Words: Myopia and Hypermetropia - Biology

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प्रश्न

Distinguish between the following pair of words:
Myopia and hypermetropia

फरक स्पष्ट करा
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उत्तर

Myopia hypermetropia
(i) The image of distant object is produced in the front and not on the retina . (i) The image is produced beyond the retina as the light rays are unable to converge on the retina. 
(ii) It results from abnormally long eyeball . (ii) It results from abnormally short eyeball.
(iii) The defect can be produced by high convexity of the lens .  (iii) The defect can be produced by low convexity of the lens .
(iv) It can be corrected by the use of spectacles having concave lens . (iv) It can be corrected by the use of spectacles having convex lens .
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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 9: Nervous System - Exercise 2 [पृष्ठ ११६]

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फ्रँक Biology II [English] Class 7 ICSE
पाठ 9 Nervous System
Exercise 2 | Q 4.08 | पृष्ठ ११६

संबंधित प्रश्‍न

A student is unable to see clearly the words written on the blackboard placed at a distance of approximately 4 m from him. Name the defect of vision the boy is suffering from. Explain the method of correcting this defect.

Draw ray diagram for the:-

(i) defect of vision and also

(ii) for its correction.


List three common refractive defects of vision. Suggest the way of correcting these defects.


the biological/technical terms for the lens of eye losing flexibility resulting in a kind of long-sightedness in middle aged people.


Differentiate between myopia and hypermetropia. What type of spectacles should be worn by a person having the defects of myopia as well as hypermetropia? How does it help?


Which part of the eye is grafted in a needy patient from a donated eye?


List two causes of presbyopia. Draw labelled diagram of a lens used for the correction of this defect of vision. 


Have a look at the posture of this woman who is reading a book and answer the questions which follow:

What are the two conditions shown in sections A and B of the eye as applicable to her?


Give Reason:

When you enter into a dark room from bright because of sunlight, you can not see things for a few seconds.


Observe the following diagram and answer questions following it: 

  1. Identify the defect of vision shown.
  2. List its two causes.
  3. Name the type of lens used for the correction of this defect.

A teacher drew the diagram of the heart on the blackboard and told the students to copy it in their notebooks. Mahesh couldn't see the diagram clearly as it appeared blurred to him.

  1. Name the defect of the eye Mahesh is suffering from.
  2. Where is the image formed in this defect?
  3. Mahesh consults an eye doctor and is prescribed suitable lenses to correct the defect. Which type of lens do his spectacles have?

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