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

Neutron is a fundamental particle carrying, Neutron is a fundamental partic...

Neutron is a fundamental particle carrying: (1)A charge of +1 unit and a mass of 1 unit    (2)No charge and a mass of 1 unit (3)No charge and no mass (4) A charg of -1

Explain musical sounds, Musical Sounds: Sound that produces pleasant ef...

Musical Sounds: Sound that produces pleasant effects on our ear is known as musical sound. Such as sound of flute, violin.

Describe the variation of the radius of bright fringe, Describe the variati...

Describe the variation of the radius of bright fringe of Newton's rings with refractive index of the thin film enclosed between the glass plate and plan-convex lens when observed b

Beryllium copper alloy, Beryllium copper alloy: It is obtained by alloying...

Beryllium copper alloy: It is obtained by alloying copper and beryllium. These alloys containing beryllium up to 2.75% can be produced in the form of sheet, rod, wire and tube. Be

Explain electromagnetic waves transverse, Using the Maxwell's equation expl...

Using the Maxwell's equation explain that electromagnetic waves transverse in nature.

Is there any way to improve side- emitting viewing, Is there any way to imp...

Is there any way to improve side- emitting viewing? A side emitting light guide is viewed optimally while the contrast among the optic and background is maximized. When the lig

Define an echo sound, An echo is easily the retransmission of speaker's ow...

An echo is easily the retransmission of speaker's own voice caused by reflection at a distance surface. If there is a sound reflector at a distance d from host, then the time in

Are there different type of slide emitting fibers, Are there different type...

Are there different type of slide emitting fibers? Nowadays some types of side emitting fibers are marketed. Several most common given as follows: Solid core optics

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