Diopters. We stopped calling glasses “prescriptions” a while back, since we don’t believe a reasonable educated individual needs a so-called professional to tell them which piece of clear, curved piece of plastic to buy. (or conversely, keep you from making your own diopter choices)
If anything, we believe that most of the mainstream will give you more diopters than you need, causing progressive myopia and all sorts of long term risky side effects. We feel strongly about education you on the subject of testing your own refraction, of making your own diopter choices. Glasses are far less dangerous than lots of over-the-counter drugs! Read this section for all things related to diopters, learn about the fascinating world of bending light (to your will).
Tori: Two Whole Diopters Less And Still 20/15???
Tori writes in the forum: Yesterday, my contact lenses arrived in an array of prescription strengths from -3.25 to -4.5. Since I have my Snellen chart, I put in my -4.00 lenses into my left eye (prescribed -4.50), opting for a larger reduction since I feel like my left eye was particularly over prescribed, and started with -3.50 (prescribed -3.75) in my right eye. Here were the Snellen results (at end of the day): R: -3.50, still 20/15 and crystal [...]
Q&A: Contact Lenses vs. Glasses (for rehab)
A quick one today, from the forum. Blake asks: So I just had a thought. My Rx is so high it causes a fisheye effect and it causes me to be very self concious, which was a big reason for going back to contacts. Would it be wiser to wear my full distance Rx in contacts and wear a +.25 or so for distance and then a +1.5 or so for close up work as opposed to a 1.5 lower [...]
Great Optometrist in Switzerland
You probably know how hard it is to find an optometrist to work with you, on healthy lens prescription choices. So many of us have to resort to a bit of guessing, centimeter measurements, and eye charts. They are all great tools and I highly recommend learning about them. Still, it's nice to have the option to stop in at the optometrist, and double check your results. If you like open minded optometrists and happen to be near Bern, Switzerland [...]
Improve Eyesight With Sunglasses?
I've been promising this one for a while. The Q&A video isn't perfectly clear on a few key points. I blame the giant ants. The main way to address blur horizon is always diopters. Lux is just "fine tuning" blur horizon, in some scenarios. This works best in the 300-1,200 lux range. Higher lux is too bright, and sunglasses are just bringing light down to a manageable range in the first place. Any lower and it's just too dim, creating [...]
Don’t Lose Your Cornea! The How (& Why) Of Thinner Contact Lenses
Two important eye health topics today. I) Contact Lenses May Damage Corneal Tissue This is a serious side effect of extended contact lens wear, and science is well aware. And yet it's probably not something your dispensing doctor ever told you. You can do several things to protect your eyesight, even if you wear contact lenses. We'll look at that, as part of: II) Shannon Got Thinner Contact Lenses (and you can too) You notice that I often advocate against extended contact [...]
+2.00: Child Myopia Prevention Glasses
You know the rules. No prescription advice here. ;-) Here's a question I forgot to answer yesterday, from the forum: I’ve also bought her a pair of +1.25 lenses for computer work, and also for reading when she starts to do it a little more. Is that a good prescription strength for prevention in a kindergartener? I've seen parents go quite a bit higher on the plus lens, as much as +2 or +2.50 for children who have absolutely no [...]