A. concave
B. Convex
C. Diverging
D. None of above
Check Answer
The correct answer is B) Convex.
Long-sight defect, or hypermetropia, could be corrected by using a Convex or converging lens. Hypermetropia is a condition in which the eye has difficulty focusing on objects that are close up, and it is often corrected with glasses or contact lenses that have a converging lens, which is a lens that is thicker in the middle than at the edges.
A concave lens, which is thinner in the middle than at the edges, is used to correct the opposite condition, called myopia or short-sight defect.
A diverging lens, which is thinner at the center and thicker at the edges, is used to correct certain other types of vision problems, such as astigmatism.
Long-sight defect, or hypermetropia, could be corrected by using a Convex or converging lens. Hypermetropia is a condition in which the eye has difficulty focusing on objects that are close up, and it is often corrected with glasses or contact lenses that have a converging lens, which is a lens that is thicker in the middle than at the edges.
A concave lens, which is thinner in the middle than at the edges, is used to correct the opposite condition, called myopia or short-sight defect.
A diverging lens, which is thinner at the center and thicker at the edges, is used to correct certain other types of vision problems, such as astigmatism.
