One might consider that the pinhole is creating an artificially small pupil, thus bypassing normal aberrations and refractive errors of the eye. The resulting increase in eyesight gives the impression of improved vision without conventional eyeglasses or contact lenses. The pinhole has been used as a diagnostic tool by eye doctors. The pinhole allows the doctor to identify blurry vision caused by an error of refraction, against the presence of a diseased condition in the eyes. Dependency Effect of Corrective Lenses Historically, the wearing of glasses was designed to permit the natural function of the eye to begin a healing process, which would later result in less dependency on glasses.
Statistics reveals that the contrary is occurring.
It would appear that wearing eyeglasses or contact lenses should correct your vision. Most eyeglasses and contact lens wearers will refute this claim. The more the eyeglasses are worn, the more dependent the eyes become to the external aid that provides the clearness. Notably, this difference in vision can be appreciated after distance fixation. The investigators proposed and tested several alternative hypotheses to explain the phenomenon.