Explain astigmatism, Physics

Assignment Help:

Astigmatism:

In this defect the surface of eye is not perfectly spherical. The eye has different focal point in dissimilar planes and image of an object is not focused clearly on the retina.

Correction:

Astigmatism is corrected by asymmetrical lenses which have dissimilar radii of curvature in dissimilar plane.

 


Related Discussions:- Explain astigmatism

Surface tension, what are the advantages of surface tension

what are the advantages of surface tension

Explain displacement, DISPLACEMENT: The change in the position of a bod...

DISPLACEMENT: The change in the position of a body from its starting position to its final position is known as displacement. It is denoted by d ?.

Find average distance of an electron in an atom, The average distance of an...

The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m

Prof, quality standards and expectations for bathymetric survey

quality standards and expectations for bathymetric survey

Define distance, The real length of path traversed by a body in a sub inter...

The real length of path traversed by a body in a sub interval of time is called as distance. It is the real path travelled by an object among its final and initial positions. It is

Why does the sky appear blue in colour, Q. Why does the sky appear blue in ...

Q. Why does the sky appear blue in colour? As-per to the Rayleigh's scattering law the shorter wavelengths are scattered much more than the longer wavelengths. The blue look o

Explain joule''s law, Explain Joule's Law: "Work done is directly propo...

Explain Joule's Law: "Work done is directly proportional to the heat produced.

Explain fresnel diffraction, If either screen or source or both are at pres...

If either screen or source or both are at preset distance from the diffracting device (obstacle or aperture), the diffraction is known as Fresnel type.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd