Difference between revisions of User:User

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In 2011, my uncorrected acuity dropped to about 20/100 (because I used the overcorrecting glasses and lacked critical information known as active focus). The optometrist measured the same -1.5/-1.25, but I felt my uncorrected vision was subjectively much worse. When I got my driver's license, I failed the visual acuity test without glasses and have to wear lenses.

In 2013, my parents switched optometrists because the location was more convenient. The optometrist measured a -0.5 D change (-2/-1.75) and was reluctant to adjust by +0.25 D (-1.75/-1.5) but still did it, and recommended me to use glasses all of the time.

In 2013, my parents switched optometrists because the location was more convenient. The optometrist measured a -0.5 D change (-2/-1.75) and was reluctant to adjust by +0.25 D (-1.75/-1.5) but still did it, and recommended me to use glasses all of the time. My uncorrected acuity was probably 20/200, with a barely readable E at the top of the chart.

In 2015, my parents went back to the same location, with a different optometrist, and she increased the diopter gap between eyes and added cylinder. When I wore the glasses, which are polycarbonate instead of Trivex, I saw lots of distortion and [[chromatic aberration]]. Fortuitously, while I was researching chromatic aberration in lens materials and whether it has something to do with polycarbonate or the cylinder, I found an endmyopia article about that topic and decided to give it a shot by using my old glasses as normalized. For this reason, I wrote about technical details of diopters and combining cylinders with different axes, in case it'll help someone find this place. I now know that CR39 plastic and Trivex are acceptable, but polycarbonate is garbage.

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 In 2011, my uncorrected acuity dropped to about 20/100 (because I used the overcorrecting glasses and lacked critical information known as active focus). The optometrist measured the same -1.5/-1.25, but I felt my uncorrected vision was subjectively much worse. When I got my driver's license, I failed the visual acuity test without glasses and have to wear lenses.
-In 2013, my parents switched optometrists because the location was more convenient. The optometrist measured a -0.5 D change (-2/-1.75) and was reluctant to adjust by +0.25 D (-1.75/-1.5) but still did it, and recommended me to use glasses all of the time.
+In 2013, my parents switched optometrists because the location was more convenient. The optometrist measured a -0.5 D change (-2/-1.75) and was reluctant to adjust by +0.25 D (-1.75/-1.5) but still did it, and recommended me to use glasses all of the time. My uncorrected acuity was probably 20/200, with a barely readable E at the top of the chart.
 In 2015, my parents went back to the same location, with a different optometrist, and she increased the diopter gap between eyes and added cylinder. When I wore the glasses, which are polycarbonate instead of Trivex, I saw lots of distortion and [[chromatic aberration]]. Fortuitously, while I was researching chromatic aberration in lens materials and whether it has something to do with polycarbonate or the cylinder, I found an endmyopia article about that topic and decided to give it a shot by using my old glasses as normalized. For this reason, I wrote about technical details of diopters and combining cylinders with different axes, in case it'll help someone find this place. I now know that CR39 plastic and Trivex are acceptable, but polycarbonate is garbage.