in order to reach the photoreceptors in the retina, light must pass through several transparent structures that refract the light - as a result, the image is:
inverted and reversed
focused
both the cornea and the lens have convex surfaces that cause light rays to be focused on the retina
although the refractive power of the cornea is greater than the lens, the power of the lens can be changed as needed to focus light from near or far objects - this adaptive process is called accomodation
