Home
Class 10
PHYSICS
What are refractive defects of vision ? ...

What are refractive defects of vision ? Why these defects arise ?

Text Solution

Verified by Experts

The defects due to which a person cannot see objects distinctly and comfortably are called defects of vision.
Sometimes, the eye may gradually lose its power of accommodation as ciliary muscles are not that able to change the thickness of eye lens as needed. In such conditions, the person cannot see objects distinctly and comfortably, i.e., the vision becomes blurred due to the refractive defects of the eye.
Promotional Banner

Topper's Solved these Questions

  • THE HUMAN EYE AND THE COLOURFUL WORLD

    KUMAR PRAKASHAN|Exercise TEXTUAL EXERCISE|13 Videos

  • THE HUMAN EYE AND THE COLOURFUL WORLD

    KUMAR PRAKASHAN|Exercise ADDITIONAL QUESTIONS AND ANSWERS|9 Videos

  • QUESTION PAPER-2 (MARCH,2020 - BOARD'S QUESTIONS PAPER)

    KUMAR PRAKASHAN|Exercise Section - D (Answer the following questions)|3 Videos

Similar Questions

Explore conceptually related problems

Name the three main common refractive defects of vision.

What is the principal defect of Bohr atom model?

An item is manufactured by three machines A, B and C. Out of the total number of items manufactured during a specified period, 50% are manufactured on A, 30% on B and 20% on C. 2% of the items produced on A and 2% of items produced on B are defective, and 3% of these produced on C are defective. All the items are stored at one godown. One item is drawn at random and is found to be defective. What is the probability that it was manufactured on machine A ?

What is the power of a lens that can be used to correct the eye defect of a person who cannot see the objects distinctly kept beyond 2 m ?

Three machines A, B and C produce respectively 30%, 50% and 20% of the total number of items of a factory. The percentage of defective output of these machines are 1%, 4% and 3% respectively. If an item is selected at random, find the probability that the item is non-defective.

An example for Frenkel defect is

What is the least distance of distinct vision ?