When I was a kid I had near-perfect vision. I remember being able to read street signs and license plates at a distance, and feeling good about that. But I don’t think that was exceptional. Unless we are damaged in some way, the eyes we are born with tend to be optically correct. Until… what?
In my case it was my junior year in college. That’s when I finally became a good student, spending long hours reading and writing in my carrel in the library basement, bad flourescent light, cramping my vision at a single distance the whole time. Then, when I’d walk out and the end of the day or the evening, I’d notice that things were a little blurry at a distance. After a few minutes, my distance vision would gradually clear up. By the end of the year, however, my vision had begun to clear up less and less. By the end of my senior year, I needed glasses for distance: I had become myopic. Nearsighted. I remember the prescription well: -.75 dioptres for my left eye and -1.oo dioptres for my right.
I then began the life of a writer, with lots of sitting still, reading things and writing on a typewriter or (much later) a computer. Since I tended to wear glasses full-time, the blurred distance vision when work was done — and then the gradual recovery over the following minutes or hours — continued. And my myopia gradually increased. So, by the time I reached my forties, I was down to -3 dioptres of correction for both eyes.
A digression into optics… “Reading” glasses, for hyperopia, or farsightedness, are in positive dioptres: +1, +2, etc. As magnifiers, they tend toward the convex, thicker in the middle and thinner toward the edges, or frames. Corrections for myopia tend toward the concave, thicker on the edges. You can sort-of see the thick edges of my frames in the YouTube video above, shot in June, 1988, when I was a month away from turning 42 (and looked much younger, which I wish was still the case). My glasses were Bill Gates-style aviators.
I also began to conclude that myopia, at least in my case was adaptive. It made sense to me that the most studious kids — the ones who read the most, and for the longest times each day — wore glasses, almost always for myopia.
So I decided to avoid wearing glasses as much as I could. I would wear none while writing and reading (when I didn’t need them), and only wear them for driving, or at other times when distance vision mattered, such as when watching movies or attending sports events. Over the years, my vision improved. By the time I was 55, I could pass the eye test at the DMV, and no longer required glasses for driving. In another few years my vision was 20/25 i
n one eye and 20/30 in the other. I still had distance glasses (mostly for driving), but rarely used them otherwise.
I’ve been told by my last two optometrists that most likely my changes were brought on by onset of cataracts (which I now have, though mostly in my right eye), and maybe that was a factor, but I know of at least two other cases like mine, in which myopia was reduced by avoiding correction for it. And no optometrist or opthamologist I visted in my forties or fifties noted cataracts during eye examinations. But all have doubted my self-diagnosis of adaptive myopia.
Now I read stories like, “Why Up to 90% of Asian Schoolchildren Are Nearsighted: Researchers say the culprit is academic ambition: spending too much time studying indoors and not enough hours in bright sunlight is ruining kids’ eyesight“… and the provisional conclusion of my one-case empirical study seems, possibly, validated.
It also seems to me that the prevalence of myopia, worldwide, is high enough to make one wonder if it’s a feature of civilization, like cutting hair and wearing shoes.
I also wonder whether Lasik is a good idea, especially when I look at the large number of old glasses, all with different prescriptions, in my office drawer at home. What’s to stop one’s eyes from changing anyway, after Lasik? Maybe Lasik itself? I know many people who have had Lasik procedures, and none of them are unhappy with the results. Still, I gotta wonder.