Pinhole Glasses
Giuseppe Colicchia, Martin Hopf, Hartmut Wiesner, Physics Education, Ludwig-Maximilians University, Munich, Germany & Dean Zollman, Department of Physics, Kansas State University, Manhattan, KS, The Physics Teacher 46, 26-27 (2008)
Eye aberrations are commonly corrected by lenses that restore vision by altering rays before they pass through the cornea. Some modern promoters claim that pinhole glasses are better
than conventional lenses in correcting all kinds of refractive defects such as myopia (nearsighted), hyperopia (farsighted), astigmatisms, and presbyopia. Do pinhole glasses really give better vision? Some ways to use this question for motivation in teaching optics have been discussed.1 For this column we include a series of experiments that students can complete using a model of the eye and demonstrate issues related to pinhole vision correction.
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