Is there any credible evidence for “computer screens ruining eyesight”?
Computer vision syndrome is not nearly as romantic. The American Optometric Association uses it to describe the discomfort that people report feeling after looking at screens for a “prolonged” period of time. When screens pervade the field of vision all day, what counts as prolonged? (Moreover, reports of discomfort seem like not much to predicate a whole syndrome on.) But the AOA’s treatment of the syndrome is intriguing. This is the so-called 20-20-20 rule, which asks that screen people take a 20-second break to look at something 20 feet away every 20 minutes.
The remedy helps us reverse-engineer the syndrome. This suffering is thought to be a function not of blue light or intrusive ads or bullying and other scourges. It’s thought to be a function of unbroken concentration on a screen 8 inches to 2 feet from the eyes. The person suffering eyestrain is taught to look 20 feet away but she might presumably look at a painting or a wall. Twenty feet, though, suggests it’s depth she may be thirsty for.
“The short-term effect of digital eyestrain is not cumulative,” Dr. Tina McCarty, an optometrist from Minnesota and member of the AOA Public Policy Committee, told Healthline. “The eyes will get better when you give them a break and/or wear the proper eyewear in the form of lenses and coatings based on the patient’s specific needs to minimize eyestrain.”
(Some random website)
According to Dr Blakeney, an optometric adviser to the College of Optometrists, computers will not permanently damage the eyes; however, they can cause strain or exacerbate existing eye conditions.
This article comes with a collection of sources.
Not convinced. But I recall reading that most Asian™ kids have good vision when they’re at kindergarten age, yet as they spend more and more time studying, more and more kids need glasses. Solution for the mom: let your kid play outside more, instead of forcing him to study. ;D