Final answer:
Dim or dull vision and lazy eye can be symptoms of myopia (nearsightedness) or astigmatism.
Step-by-step explanation:
Dim or dull vision, as well as a lazy eye, can be symptoms of various vision problems.
One common vision defect that can cause these symptoms is myopia or nearsightedness. In myopia, distant objects appear blurred because their images are focused in front of the retina rather than on the retina.
Another common vision defect that can cause these symptoms is astigmatism. Astigmatism is an unevenness or asymmetry in the focus of the eye, resulting in elongated images. This defect is primarily due to irregularities in the shape of the cornea, but it can also be due to lens irregularities or unevenness in the retina.