OCR GCSE Biology 2025 – 400 Free Practice Questions to Pass the Exam

Short-sightedness, also known as myopia, is a common vision condition where distant objects appear blurry while close objects can be seen clearly. This condition occurs when the eye is slightly longer than normal or when the cornea is too curved. To correct this vision problem, concave lenses are used.

Concave lenses are thinner at the center than at the edges and help to diverge light rays before they enter the eye. This divergence allows the light to focus further back onto the retina, thus helping to clear up the vision for distant objects. Using a concave lens effectively compensates for the eye's shape and refractive error, ensuring that light is correctly focused onto the retina.

Other types of lenses, such as convex lenses, typically help with far-sightedness, while bifocal lenses are designed for individuals who have both near and far vision issues. Flat lenses do not alter the path of light and therefore do not assist in correcting refractive errors. Hence, the choice of concave lenses is crucial in the management of short-sightedness.