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

Explain about refracting telescopes, Refracting telescopes, if uncorrected,...

Refracting telescopes, if uncorrected, suffer from chromatic aberration.  Chromatic aberration occurs because: a)  red light is focused more strongly than blue light b)

What is a p-n junction, What is a P-N junction? How does it behave under fo...

What is a P-N junction? How does it behave under forward and reverse bias?  Describe with the help of circuit diagrams.

Light, diffenrence between pure and impure spectrum.

diffenrence between pure and impure spectrum.

What is polymorphism, What is Polymorphism Polymorphism in materials sc...

What is Polymorphism Polymorphism in materials science is the skill of a solid material to exist in more than one form or crystal structure. Polymorphism can potentially be fou

Explain the procedure of finding miller indices, Explain the procedure of f...

Explain the procedure of finding Miller indices. Procedure of finding Miller indices: a. The intercepts of the needed plane onto the three coordinate axes has to be founded.

Wedge plus pulley constraint, please explain wedge plus pulley constraint r...

please explain wedge plus pulley constraint relation.

What is the sign of the charge of the cup, Regard as two Styrofoam cups. Ea...

Regard as two Styrofoam cups. Each one is on the end of its own neutral slender glass rod which serves as a handle. One of the cups has a fixed amount of positive charge consistent

Pie, my question is regarding value of pie whether its decimal value which ...

my question is regarding value of pie whether its decimal value which has non-repeating nature goes to infinity or it ends at some place?

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 ?.

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