While talking with friends about retina displays, resolution of TVs in relation to viewing distance, and so on, I pointed out that not everyone goes periodically to the eye doctor, unless the difficulty in seeing is evident. Not everyone therefore needs retina displays.
I wonder what is the actual distribution, if known, of the actually corrected visual acuity in the population.
I'm not referring to the achievable acuity after perfect correction, I'm referring to the distribution of what people tolerate before going to the doctor and have the glasses updated. For example, I know that many young or mature people with about 0.9975 (decimal scale, also called -0.25 dioptries) do not wear glasses at all because not worth the effort. Older people typically care even less about proper correction, because their "good enough" is broader.
Are there studies that measured this parameter?