Over on Reddit, one user has an unusual question about their
“I was just in bed eating crackers and decided to look at the TV through the holes in the cracker,” the Redditor explained in the
Strange as this sounds, it is actually a thing. Of course the effect is not limited to Country Cheese crackers, nor crackers in general.
Known as the pinhole effect, all you need to do is to create a small hole in a piece of paper, or a small hole between your fingers, in order to improve your vision.
“When light passes through a small pinhole or pupil, all unfocused rays are blocked, leaving only focused light to land on the retina to form a clear image,” Associate Professor at Pennsylvania College of Optometry Bisant A. Labib explained in
This doesn’t work for all vision defects, only
“This is actually a technique we use in the clinic when a patient comes in having blurry vision and we want to know really fast if the blurry vision is a refractive condition, meaning they need glasses or contacts,” optometrist Dr Neal Guymon explained for his YouTube channel
“We’ll put pinhole glasses right over that eye, and if their vision improves then likely glasses or contacts will improve their vision. If we do it and their vision does not improve then likely something else is going on, a medical condition [or] something going on [in] the back of the eye that’s causing the blurry vision.”
The content of this article is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of qualified health providers with questions you may have regarding medical conditions.
All “explainer” articles are confirmed by