Thank you. The difficulty in purchasing glasses is so obvious to anyone who has traveled extensively. What wasn't addressed in the article is the accuracy of t

Thank you. The difficulty in purchasing glasses is so obvious to anyone who has traveled extensively. What wasn't addressed in the article is the accuracy of the typical eye exam. A 19th century idea: a single specified distance, no movement, perfect black vs white contrast, well-lit room, etc. Does it really measure "real-world" scenarios like driving at night, playing sports, or staring at a computer for 10 hours? I've received (mandatory, due to the U. S. laws described) prescriptions that were way off, that missed my astigmatism, or which switched the eye with the stronger correction. This is why being able to diagnose one's self, to an extent (buying glasses which vary 0.25 or 0.5 from the exact prescription) should be allowed, at the very least.