Correcting Vision _ GCSE Physics

The video tutorial explains vision defects, focusing on short-sightedness and long-sightedness. Short-sightedness is caused by an elongated eyeball or a powerful lens, corrected with diverging lenses. Long-sightedness results from a short eyeball or weak lens, often due to aging, corrected with converging lenses. The power of lenses is calculated using the formula p = 1/f, with diverging lenses having negative power. Laser eye surgery is a permanent solution, reshaping the cornea to focus light on the retina.

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