Final answer:
Hyperopia, also known as farsightedness, is a vision condition where light focuses behind the retina, making nearby objects appear blurry. This can occur when the eyeball is too short or the lens is not curved enough. It is commonly corrected with convex lenses or laser surgery.
Step-by-step explanation:
The vision abnormality that occurs when light is focused behind the retina is known as hyperopia or farsightedness. This condition means that the person can see distant objects well, but close objects appear blurry. It may arise from the eyeball being too short from front to back or from the lens not being curved enough. A sign of hyperopia in visual perception is the ability to see distant objects clearly while finding close ones out of focus.
Hyperopia can be corrected with the use of corrective lenses or laser surgery. Corrective lenses for hyperopia are typically convex in shape, curving outward to adjust the focal point so that it falls directly on the retina rather than behind it. This addresses the issue of the shorter eyeball or the less curved lens.
Astigmatism and myopia are other common vision defects, with myopia being the opposite of hyperopia, where the light is focused in front of the retina, blurring distant objects.