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

Solid stae physics, obtain an expression for dipolar polarisability of a di...

obtain an expression for dipolar polarisability of a dielectric at moderate temperature

Diagram of nicol prism, Please explain diagram of nicol prism, How its work...

Please explain diagram of nicol prism, How its working and how its mechanism,,,

Explain about the term ultrasonics shortly, Explain about the term ultrason...

Explain about the term ultrasonics shortly. The world ultrasonics applies to sound waves which vibrate at a frequency higher than the frequency which can be heard through the h

Explain basic principle of holography, Explain basic principle of holograph...

Explain basic principle of holography Holography is a new method of producing a 3D image of a 3Dobject. An ordinary photograph is only a 2D image of a 3D object. The photograph

Filtering and image masking, Regarding filtering, image masking & convoluti...

Regarding filtering, image masking & convolution. Assume we have the following Infra-Red image:   What filter would you use to remove the impulsive noise in the first row o

Calculate the polarization angle of the substance, Critical angle in certai...

Critical angle in certain substance is 300. Calculate the polarization angle of the substance?

Maximum recombination time, Ask question how to plan and design a lab to me...

Ask question how to plan and design a lab to measure the maximum recombination time of ions produced by a flame

Define some factors which cause a system to oscillate, Write down the facto...

Write down the factors which force a system to oscillate?

Explain two-stage rocket, Two Stage Rocket Suppose the motion of the tw...

Two Stage Rocket Suppose the motion of the two-stage rocket or the corresponding velocity-time graph below. The rocket has two successive fuel stages followed through a free-fa

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