Corrective glasses use lenses to bend light rays so they focus properly on the retina. For nearsighted or farsighted people, glasses adjust how light enters the eyes, helping form clear images instead of blurry ones.
Class 8 Science Curiosity Grade 8 Chapter 1 Exploring the Investigative World of Science question answer
Class 8 NCERT Science Curiosity Chapter 1 Exploring the Investigative World of Science solutions
In nearsightedness, the lens spreads the light to move the focus backward. In farsightedness, it bends light to bring focus forward. This correction ensures that light focuses exactly on the retina, producing a sharp image. Understanding how light bends through lenses explains how glasses help millions see clearly and how optical science improves vision through precise lens shapes.
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