Which eye defect is corrected by cylindrical lens? , 12 | Ray optics and light...

The eye defect, Astigmatism can be corrected by using , -

(a) A student cannot see clearly a chart hanging on a wall placed at a distance of 3m from his eyes. Name the defect of vision he is suffering from. Draw a ray diagram to illustrate this defect. List its two possible causes. (b) Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length. (c) What do you mean by the 'Power of Accommodation' of human eye?

Name the defect of vision which can ne corrected by a converging lens. Show clearly by a ray diagram how the lens corrects the defect.

A: Ray optics assumes that light travels in a straight line which is disapproved by diffraction effects, yet the ray optics assumption is so commonly used in understanding location and several other properties of images in optical instruments. R: Typical sizes of apertures involved in ordinary optical instruments are much larger than the wavelength of light.

Name the defect of vision which can be corrected by a diverging lens. Show clearly by a ray diagram how the lens corrects the defect.

Which of the following is a correct statement ? The ray of light

In the myopia eye defect, the rays of light