Do pinhole reading glasses work?
On One Hand: The Design Has MeritsPinhole glasses, which resemble sunglasses with many tiny holes poked in them, provide a wearer with vision defects with a clearer image by making use of the “pinhole effect.” In the pinhole effect, if the amount of light to the eye is reduced in a certain way, the pupil reduces in size, resulting in a clearer image. The concept is similar to scrunching your eyes.On the Other: They Don’t WorkWhile pinhole glasses can temporarily improve vision, many marketers claim, falsely, that they can permanently correct vision. Pinhole glasses are also generally inferior to normal eyeglasses, as they allow in less light and give a less clear image than prescription lenses.Bottom LineIn 1993, the U.S. Federal Trade Commission ordered makers of pinhole glasses to cease claiming that their products could cure vision disorders.
