Explain Presbyopia using the following points- ( c) Correction. – InterviewSolution

1.	Explain Presbyopia using the following points- ( c) Correction.
Answer» SOLUTION :( c) SOMETIMES people also suffer from nearsightdness as WELL as farsghtedness. In such a case, bifocal LENSES are required to correct the defect. In such lenses, the upper part is CONCAVE lens which correct nearsightedness, while the lower part is a convec lens which correct the farsightedness.

Discussion

No Comment Found

Related InterviewSolutions

What is the reason for the twinkling of stars ?
The change in magnetic field lines in a coil is the cause of induced electric current in it.Name the underlying phenomenon.
Say True or False.The mass of the Earth is 6.4xx10^(6)kg.
Whichof the follwing property of a proton can changewhileit moves freelyin a mageticfield ? (There may be more thanone correct answer).
When an object is placed infront of a spherical mirror at a distance 30 cm, the magnification is -1. Illustrate the conclusions.
Does the frequency of sound waes depend on the medium in which it travels?
The relation between N (no. of molecules), P,V. & T is ...........
What is magnification of a lens ?
A person is said to be colour blind if he/ she has deficiency of rod shaped cells in retina of his eyes.
"___________" prepares the 'Red List' that contains the names of endangered species from different countries.