Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-07: Physics›Refraction of light: Laws of refraction, refraction by glass slab, critical angle, total internal reflection and daily life applications, lenses (converging and diverging), focal length, optical centre, image formation by lens, human eye (defects and remedies), comparison between photographic camera and human eye, simple telescope and astronomical telescope›What is used for correcting astigmatism?

What is used for correcting astigmatism?

20233M#mppsc-forest#pyq#mcq#2023
A.Cylindrical lensCorrect
B.Converging lens
C.Diverging lens
D.Diverging mirror
Explanation & Solution

Correct Answer: (A) Cylindrical lens

Astigmatism is a common eye defect caused by an irregular curvature of the cornea or lens, which can be corrected using a cylindrical lens. This lens compensates for the unequal refraction of light in different meridians.

हिंदी में प्रश्न एवं आदर्श उत्तर

दृष्टि वैषम्य दोष के निवारण के लिए किसका उपयोग होता है?

A.बेलनाकार लेंससही
B.अभिसारी लेंस
C.अपसारी लेंस
D.अपसारी दर्पण

सही उत्तर: (A) बेलनाकार लेंस

दृष्टि वैषम्य (ए)।स्टिग्मेटिज्म) कॉर्निया या लेंस की अनियमित वक्रता के कारण होने वाला नेत्र दोष है, जिसके निवारण के लिए बेलनाकार लेंस (सिलिंड्रिकल लेंस) का उपयोग किया जाता है।

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