How Glasses Work to Correct Vision

You may have to wear glasses. How do they work? When you are farsighted ( hyperopia) objects far away are clear but object close appear blurry. This type of problem can be fixed with a convex lens. A concave lens is used to fix the opposite problem created when you are nearsighted.
Transcript
http://www.moomoomathblog.com/2020/09/how-glasses-work-to-correct-vision.html

Видео How Glasses Work to Correct Vision канала MooMooMath and Science