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

4, #question.5.

#question.5.

Schottky diode, what are the v-i characteristics of schottky diode?

what are the v-i characteristics of schottky diode?

Maxwells equations, Maxwell's equations (J.C. Maxwell; 1864): Four ele...

Maxwell's equations (J.C. Maxwell; 1864): Four elegant equations that describe classical electromagnetism in its entire splendor are following.

Work and energy, WORK AND ENERGY   1.  Work can be defined as: the f...

WORK AND ENERGY   1.  Work can be defined as: the force applied in direction of displacement ×.  This means that if the force F acts at an angle θ with respect to the direct

Explain the single mode fibres in intermodal dispersion, Explain about the ...

Explain about the single mode fibres in intermodal dispersion. Into single mode fibers, the core size of the fibre is decreased to 3 to 9µm so that this supports simply axial m

Experiment of a wooden ring stand, A wooden ring stand The bottom for t...

A wooden ring stand The bottom for this ring stand is made from a piece of wood 40 cm long, 15 cm wide and 1 cm thick. A whole 1 cm in diameter is bored by the centre of the ba

What is permeability?, It is the property of a material by virtue of which ...

It is the property of a material by virtue of which it allows itself to be magnetized. Permeability varies from material to material depending upon the saturation and temperature.

Optical fibre, What are the types of fibre optics?

What are the types of fibre optics?

Exhaust gas temperature, Exhaust gas temperature Monitoring of the temp...

Exhaust gas temperature Monitoring of the temperatures within the engine core is performed by the exhaust gas temperature system. The operating limits of the engine, and monit

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