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

Right-hand screw rule, Right-Hand Screw Rule In physics, the right-hand...

Right-Hand Screw Rule In physics, the right-hand rule is a general mnemonic for understanding notation conventions for vectors in 3 dimensions. It was invented for use in elect

How many electrons possesses by germanium, Germanium possesses (A) One...

Germanium possesses (A) One valence electrons. (B) Two valence electrons. (C) Three valence electrons. (D) Four valence electrons. Ans: Germanium possess

Motion animation, Motion Animation A car along with a non-zero initial ...

Motion Animation A car along with a non-zero initial speed has a constant acceleration whose value could be controlled through the user.

What are the properties of cathode rays, (i)Cathode waves always travel in ...

(i)Cathode waves always travel in straight path.   (ii) Cathode rays exert mechanical force on the objects they strike. (iii) Cathode rays make fluorescence. (iv)

Bug on a bowling ball, Bug on a Bowling Ball A bug sitting on top of a ...

Bug on a Bowling Ball A bug sitting on top of a bowling ball begins to slide o? with negligible friction. Conclude the angle at which the bug leaves the surface. This proble

How the scattered electrons form strong diffraction pattern, Davisson and G...

Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What significant conclusion was drawn from thi

Explain electrical bell, Electrical Bell: 1.An electromagnet, which is ...

Electrical Bell: 1.An electromagnet, which is made by winding insulated copper wire on a soft iron core. 2.An armature which is soft iron strip with spring. 3.A soft iron

SAFA, Physics assignment electron microscopy component, solve problem. can ...

Physics assignment electron microscopy component, solve problem. can u solve these two problems with detailing and referencing if it needed

Application for Subject Matter Expert in Physics., Hello! I would like to a...

Hello! I would like to ask if there is a job in Physics which is 24/7 Question Answering/problem solving and if any, I would like to apply for it. Thank You Prerak Dhawan

Determine the total circuit resistanc, Two resistors, of resistance 3 and ...

Two resistors, of resistance 3 and 6, are connected in parallel across a battery having a voltage of 12V. Determine (a) The total circuit resistance and (b) The current ?

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