Final answer:
The eye corrects image formation issues through the cornea and lens system that adjusts for clear vision. Myopia, characterized by a longer eyeball that focuses images in front of the retina, is corrected with concave lenses, and its increase is attributed to lifestyle factors such as extended use of screens.
Step-by-step explanation:
The eye overcomes issues with image formation by adjusting the shape of its lens to focus light directly onto the retina. The cornea and eye lens help to correct the vision by acting as a single thin lens system. In the case of myopia, or nearsightedness, the eye is longer than normal, causing images to be focused in front of the retina. A concave lens is used to correct myopia. If the eye is too short, it causes hyperopia, or farsightedness, which results in images being focused behind the retina; this is corrected with a convex lens. An irregularly formed cornea can lead to astigmatism, affecting how the light is focused on the retina, which can also be corrected with specific lenses.
Myopia has been on the rise due to various factors, including increased close-up visual activities such as screen time and less time spent outdoors. These habits can stress the eye's focusing mechanism, leading to a lengthening of the eyeball.
For cases where lenses may not be the preferred solution, corrective surgeries like LASIK can permanently reshape the cornea, thus allowing light to be properly focused onto the retina.