The bending of light rays so they focus on the retina is called refraction.
Simply put, light rays do not focus light because the focus is on the wrong side of the lens, with respect to the incoming light. If you draw the ray diagram you will see that the parallel rays transmitted may appear to be coming from a focus. This is what they mean by virtual.
Bi-Convex lens can be used to focus the Sun's rays
yes
Optical or Light microscope
The bending of light rays so they focus on the retina is called refraction.
The lens bends the light rays to focus them on the retina.
myopia
accommodation
Macula Lutea
The rays of light focus beyond the retina.
Lens
When bending light rays to focus them on the retina the two structure involved are the air-cornea interface which accounts for about two-thirds of the light-bending process and the lens which accounts for the remaining third but also makes the necessary adjustments to allow the eye to focus on objects at different distances.
This process that produces a focused image on the retina through the bending of light rays is called refraction. To bring near and far objects into focus, it is necessary for the eye lens to make an adjustment through this process as light rays enter the retina.
Accommodation
Transparent, biconvex intraocular tissue that helps bring rays of light to a focus on the retina.
emmetropia