Which type of image is formed on the retina?

What is the name of the outer thin membrane over the eyeball?

The size of the pupil is controlled by which of these?

What is the minimum distance for clear visibility in human eyes?

Human eyes can clearly see up to which distance but not beyond that?

Which of  following is true about a person suffering from myopia?

Which type of lens is needed to rectify the problem of myopia?

Bi-focal lens is advised to a patient suffering from which of these conditions?

Which colour from the visible spectrum can travel the farthest?

Which of these is responsible for the formation of rainbow?