Can a short-sighted person with no corrective appliance see an object more clearly than a person with no impediment, if the object is at an optimal distance for them (i.e. closer than the unimpaired person could tolerate)?

My thinking is that the short-sighted person can tolerate the object being closer, therefore has an advantage in the sense they will be absorbing more 'photonic information' (!?) about the object?

I was going to ask on healthcare.stackexchange but feels a bit more advanced, hence hope it's okay to ask as physics question.

  • $\begingroup$ Biology.stackexchange.com $\endgroup$ – Tobi Feb 18 '17 at 2:45

I have +10 diopter nearsightedness. My focus distance ranges between 2 and 2.5 inches. I take my glasses off to do extreme closeup detail work. I can use only one eye at a time at this distance since 2" is too close to point both eyes at the same spot.

The ability to get this close is the only positive aspect of this much nearsightedness :-). Had I been born 200 years ago I'd probably have made a good watchmaker.

If you want to experience this yourself, buy the strongest reading glasses you can find, probably +3.5.

  • $\begingroup$ To put this in more general terms we say that the "near point" of a near-sighted person is closer than that of a nominally focusing or far-sighted person (at least for the same age range). $\endgroup$ – dmckee Feb 18 '17 at 6:47

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