Long sight or myopia is a defect in the eye that is more common in old age. People suffering from this defect can read a book clearly, but find it difficult to see a distant road sign. The image of the object, instead of forming in front of the retina, forms behind it. This defect can be corrected by using a convex or a diverging lens.
The paragraph should be rewritten as follows:
Long-sightedness or hypermetropia is a defect in the eye that is more common in old age. People suffering from this defect cannot read a book clearly, but find it easy to see a distant road sign. The image of the object, instead of forming on the retina, forms behind it. This defect can be corrected by using a convex or converging lens.