How do optometrists determine what strength prescription a toddler needs with such limited communication skills?
In: 7
For most people who are just near or far sighted, it’s just an issue of the shape of your eye, and the lens not being able to focus the light exactly onto the retina. For this, you can take measurements and they can get fairly close to required prescription. For those who use corrective lenses, you’re probably familiar with the machine that shows either a barn or balloons or something fairly simple, and it goes in and out of focus, usually ending in focus. This machine can take some measurements and get pretty darn close to your required Rx. You’ll notice that when you later go into the exam room and the doctor starts the “which is better, 1 or 2” part of the exam to get your exact measurements, the starting point isn’t just some random setting, it’s fairly close, say about within 95% of your actual needed correction. They got to this point with those prior measurements.
For a young child who isn’t reading yet, getting 95% of the way there will be such a big improvement that the 5% difference won’t be significant.
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