Eyes, Glasses, Nearsighted and Farsighted
Explanation of what nearsightedness and farsightedness mean. How lenses work and how the human eye works. How you can correct nearsightedness and farsightedness with glasses.
Explanation of what nearsightedness and farsightedness mean. How lenses work and how the human eye works. How you can correct nearsightedness and farsightedness with glasses.