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Pinhole glasses: Quiz


Question 1: Similar to the workings of a pinhole camera, each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the ________ on the retina and increases depth of field.
Digital cameraApertureScience of photographyCircle of confusion

Question 2: Pinhole glasses have been marketed by various companies on the claim that—combined with certain ________—they could permanently improve eyesight.
StrabismusConvergence insufficiencyEye exercisesBates method

Question 3: While pinhole glasses are useful for people who are both near- and far-sighted, they are not recommended for people with over 6 diopters of ________.
Astigmatism (eye)MyopiaKeratoconusGlaucoma


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