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In June 2015, I started with cm measurements suggesting -2.5/-2 (40, 50 cm). I learned active focus very quickly and I used my old -1.75/-1.5 glasses as normalized (0 differential because I never used glasses for close-up) and quickly reduced to my old -1.25/-1, as I saw the cm measurements go to -2/-1.75 in 10 days, but it plateaued, probably because of what I did next. I also noticed it was hard to sleep on days with significant change in cm, almost as if the changes acted like stimulants like caffeine. Because the diopter gap seemed to get smaller, I thought that I could tolerate large unbalanced focal plane changes quickly, so I went to -1 to equalize, and then I went to -0.75 and later 0 for extra stimulus, since that supposedly helps to break a plateau. I also messed up focus pushing by being too far away. I didn't know how to measure, so I ended up measuring two different values with and without AF, which were steadily suggesting -2/-1.8 with AF to -1.7/-1.5 (about 0.3 D AF capacity). It would explain the -1.5 reading from the optometrist with a 6m chart resulting in refraction of -1.5/-1.33, which round to -1.5. | In June 2015, I started with cm measurements suggesting -2.5/-2 (40, 50 cm). I learned active focus very quickly and I used my old -1.75/-1.5 glasses as normalized (0 differential because I never used glasses for close-up) and quickly reduced to my old -1.25/-1, as I saw the cm measurements go to -2/-1.75 in 10 days, but it plateaued, probably because of what I did next. I also noticed it was hard to sleep on days with significant change in cm, almost as if the changes acted like stimulants like caffeine. Because the diopter gap seemed to get smaller, I thought that I could tolerate large unbalanced focal plane changes quickly, so I went to -1 to equalize, and then I went to -0.75 and later 0 for extra stimulus, since that supposedly helps to break a plateau. I also messed up focus pushing by being too far away. I didn't know how to measure, so I ended up measuring two different values with and without AF, which were steadily suggesting -2/-1.8 with AF to -1.7/-1.5 (about 0.3 D AF capacity). It would explain the -1.5 reading from the optometrist with a 6m chart resulting in refraction of -1.5/-1.33, which round to -1.5. | ||
Over 6 years, there was no blur anymore and I got better at clearing the polyopia ("double vision" is actually "multiple vision"), but I could never clear it completely. Even in late 2015, without glasses, I even once had a clear flash that let me see small text on a sunny outdoor sign 80m away that I estimate corresponds to 20/8 acuity, but it was very short and hard to reproduce. I then got lazy and recorded cm measurements more rarely, but they show a measly +0.05 D change over the last 6 years. | Over 6 years, there was no blur anymore and I got better at clearing the polyopia ("double vision" is actually "multiple vision"), but I could never clear it completely. Even in late 2015, without glasses, I even once had a clear flash that let me see small text on a sunny outdoor sign 80m away that I estimate corresponds to 20/8 acuity, but it was very short and hard to reproduce. I then got lazy and recorded cm measurements more rarely, but they show a measly +0.05 D change over the last 6 years (possibly just measurement error). | ||
== Day 10-14 == | |||
This week, I decided to fix the issues. Based on the measurements, it makes sense to use -1.25 (AF blur horizon from 133 cm to 222cm) or -1.5 (AF blur horizon from 2m to 10m) normalized to equalize properly. -1 puts the -1.6 D target too close to be usable, as AF requires full clarity, or else it's undercorrected. Since I'm either indoors or would get extra depth of field from sunlight, -1.25 seemed to make more sense. | This week, I decided to fix the issues. Based on the measurements, it makes sense to use -1.25 (AF blur horizon from 133 cm to 222cm) or -1.5 (AF blur horizon from 2m to 10m) normalized to equalize properly. -1 puts the -1.6 D target too close to be usable, as AF requires full clarity, or else it's undercorrected. Since I'm either indoors or would get extra depth of field from sunlight, -1.25 seemed to make more sense. | ||
Current normalized: -1.25 | Current normalized: -1.25 | ||
Current differential: 0 | Current differential: 0 | ||