I got some old lenses measured while I was at the doc today, and got some odd results.
Very old lenses:
-12.75 -0.75 @ 019
-11.75 -1.25 @ 009
-14.50 -0.75 @ 083
-14.25 -0.75 @ 156
-16.25 -0.5 @ 65
-15.5 -1.0 @ 057
Recent manifest refraction:
-17.0 -1.0 @ 076
-16.25 -1.0 @ 141
Ok, so right eye was steadily progressing, pretty minimal astigmatism, doc might be twiddling with astigmatism to get that extra eighth diopter of sphere equivalent, but what the heck is going on with the astigmatism axis? I can see it changing a tad, but several of these are more than 45 degrees off, which essentially reverses the power? We saw those last two numbers earlier in my log thread and there was speculation that this amounted to malpractice, but this no longer looks like one mistake by the student doc at that last manifest refraction.
The tech thought it odd that the one pair had a much higher astigmatism in one eye than the other. He’s used to seeing more balanced prescriptions. He didn’t note the difference in axis between the two pairs he looked at.
These wild swings in axis could be why I generally take weeks to adjust to new lenses and wait until I’ve gone up significantly to get an exam. On the other hand, this wild change may also be what’s driving me to those exams, that the astigmatism correction becomes counter productive as my eyes change.
I’m trying contact lenses now with no astigmatism correction. Doc is not at all concerned about my astigmatism, it’s such a small percentage of my overall power. Going forward I intend to get any independently ordered lenses without astigmatism correction. This is mostly an academic exercise in my case.
In contacts, with no astigmatism correction, the sphere powers are reversed, with the left eye having the stronger lens and the right the step down. This doesn’t jive with the sphere equivalents of the above refraction either, the astigmatism wasn’t that unbalanced…
I’m not done with the contact trial fitting period, doc wants to see me again after I’ve worn these new trial lenses a week. I’d been wearing a half diopter low for only a few minutes when he decided to bump me up a half diopter and order new trial lenses. He thinks it’s possible there will be further adjustments.