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The eye ball of a person is small in size. The power of the eye lens is normal he is having the problem of:

Amyopia

Bpresbyopia

Chypermetropia

Dastigmatism

Answer:

C. hypermetropia

Read Explanation:

  • The person is likely having the problem of (C) hypermetropia.

Explanation

  • Hypermetropia, also known as farsightedness, is a condition where a person can see distant objects clearly but has difficulty focusing on nearby objects.

  • It can be caused by the eyeball being too short or the eye lens being too flat.

  • When the eyeball is small, the distance between the lens and the retina is shorter than normal. This causes light rays from a nearby object to focus at a point behind the retina, rather than directly on it, resulting in a blurred image.

  • The problem can be corrected by using a convex lens (a converging lens), which helps focus the light rays onto the retina.

The other options are incorrect for the following reasons:

  • (A) Myopia (Nearsightedness): Occurs when the eyeball is too long, causing light rays to focus in front of the retina.

  • (B) Presbyopia: A natural aging process where the eye's lens loses its ability to focus, making it difficult to see close objects. This is not caused by the size of the eyeball.

  • (D) Astigmatism: Caused by an irregularly shaped cornea or lens, which results in blurred vision at any distance.


Related Questions:

Identify the correct relation between radius of curvature 'R', object distance 'u' and image distance 'v' for a spherical mirror?
ഒരു കോൺകേവ് ദർപ്പണത്തിനു മുമ്പിൽ 10 cm അകലെ പ്രകാശിക്കുന്ന വസ്തു വച്ചപ്പോൾ അതിൻ്റെ യഥാർഥ പ്രതിബിംബം ദർപ്പണത്തിൽ നിന്ന് 40 cm അകലെ രൂപപ്പെടുന്നു. ദർപ്പണത്തിൻ്റെ ഫോക്കസ് ദൂരം കണക്കാക്കുക.
ഒരു ബസ്സിൽ റിയർ വ്യൂ മിറർ ആയി ഉപയോഗിച്ചിരിക്കുന്ന കോൺവെക്സ് ദർപ്പണത്തിന്റെ ഫോക്കസ് ദൂരം 0.6 മീറ്റർ ആണ്. ഇതിൻ്റെ വക്രതാ ആരം നിർണ്ണയിക്കുക.
Which glass is used for making lenses and prisms?

Which of the following line(s) act as a normal to a spherical mirror?

  1. (i) Line joining the pole and centre of curvature
  2. (ii) Line joining the centre of curvature and point of incidence
  3. (iii) Line joining focus and point of incidence