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

Modulation and transmission, The amplified video signals are amplitude modu...

The amplified video signals are amplitude modulated using a suitable r.f. carrier wave in a transmitter called ‘AM' picture transmitter. Similarly, the amplified audio signals are

Clamper, assignment of clamper

assignment of clamper

Simple harmonic motion, what is the motion of an oscillating column in a u-...

what is the motion of an oscillating column in a u-tube?

Power, Power: The rate of doing work is called power, and it is defined...

Power: The rate of doing work is called power, and it is defined as the work done in unit time.  As a formula, this would be: power = work done/time Taken  Power is exp

Ray optics., a glass prism in the shape of a quaeter-cylinder lies on the t...

a glass prism in the shape of a quaeter-cylinder lies on the table.a uniform,horizontal light falls on its vertical plane surface,as shown in the figure.if the radius of the cylind

Isothermal compression and adiabatic expansion of ideal gas, Define Isother...

Define Isothermal Compression and Adiabatic Expansion of Ideal Gas ? An ideal gas is dense at constant temperature from volume v 1 to volume v 2. a) Calculate the work

What is angle of friction?, Angle of friction is the angle between the resu...

Angle of friction is the angle between the resultant vector(resultant vector:-resultant vector of   frictional force and normalforce) and normal force vector.

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