Presbyopia

If you look closely at this infrared image on the left side, you will see houses slightly out of focus, not because yours truly screwed up in taking the shot but rather how infrared wavelengths drift out of focus from time to time with lenses & cameras keyed to visible light. Now consider looking at a computer screen or smartphone for 8 hours to see how out of focus eyes can permanently become given just how intense screens on said devices tend to be in the year of our lord 2018.

To see if your own eyes are hardening, look no further than your phone, which should require no exertion; you’re probably already there. Keep peering at your screen, reading and staring, snubbing life’s third dimension and natural hues. The first sign of the eyes’ becoming teeth is the squinting at phones. Next comes the reflexive extending of the arm, the impulse to resize letters into the preschool range. And at last the buying of drugstore readers.

Modern medicine offers little apart from magnifying glasses to treat presbyopia (from the Greek presbus, meaning “old man”). But those $3.99 specs will get you on your feet just fine, which is to say, you can once again relish your phone without squinting or arm-stretching. A remedy for farsightedness evidently succeeds to the degree that it restores a woman or man to the comfortable consumption of texts, email, ecommerce, and social media on a glazed rectangle of aluminum alloys held at a standard reading distance of 16 inches. With reading glasses we live again.

Doesn’t this seem like an unwholesome loop? The eyes may be unwell, but the primary object of our eyesight seems corrosive. We measure our vision against the phone, all the while suspecting the phone itself is compromising our ability to see it.

But there is a common sense remedy to this.

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.

Yours truly does the 20-20-20 rule to the max even though my eyes vis a vis close up vision crapped out years ago due to age but with that being said, said vision has not gotten any worse looking at screens of all sizes beginning in the late 70's of B&W 80 character displays, courtesy Perkin Elmer, creating fine art 3D graphics on the MAGI system using Fortran 77 as the weapon of choice to create said art in question. :)