After going all out on eyesight measurement for a while, my result is still murky. What’s cause and effect here? Are my actions shortening my eyes? Are we really on the right track with outdoor vision and the Reduced Lens Method? Is Jake’s “standard rate” of improvement really possible for normal people?
To figure this out with higher confidence, I will drastically change my behavior for at least August, in an attempt to roughly double the stimulus available to my eyes. (More precisely, I already started, on the 30th of July.) During the experiment, I will:
- aim for a daily minimum five hours of daylight outdoor distance vision.
- make sure to take breaks from near work without fail.
- shift my sleep times to use as much daylight as possible.
I won’t stop for anything short of health issues. If it rains all day, I’ll be out there with an umbrella for at least five hours. And after keeping this up for over a month, I will top it off with multiple weeks of biking through Italy.
As usual, I will measure my results (whenever I am home) and log axial length as well as focus reach (with measurement glasses).
The purpose of this is to confirm or question the claim that Jake’s rate of improvement of 0.25 dpt every 3–4 months through shortening of the eye is actually possible. This rate corresponds to roughly 1 µm of shortening per day, which should be well visible in my log. So there will be a quantified answer of how well this works.
Just posting this to announce it as a proper experiment. I’ll write updates once data starts rolling in. I’m motivated! Let’s do this! See y’all around, I’m going outside now.
The experiment was terminated after 80 days, a little earlier than planned. Click here for the corresponding update post.
Overall, the experiment had a moderate outcome. My eyes did not shorten at the proposed rate, but a rough estimate of change indicated shortening of 20 µm on my left eye, and 24 µm on my right – based on lagging EMAs, and not compensating for potential additional lag of the eyes’ response.
The experiment result suggests that simply piling on extra outdoor hours over a few months, using medium undercorrection, may work to reduce myopia, but high amounts of daily outdoor time did not seem particularly more effective compared to medium amounts of daily outdoor time. Of course, this was a short, N=1 experiment, so your results are likely to vary.