# 7 doctors weighed in: How do I read the results of my eye exam to know how bad my vision really is? 7 doctors weighed in

Dr. Richard Bensinger
Ophthalmology
3 doctors agree
In brief: Difficult
A problem is that the number you receive for your eyeglass prescription does not easily correlate with the snellen fraction (the one that says 20/20 or whatever).
So for instance a +2.00 correction might see 20/40 uncorrected while a -2.00 (note the sign) correction might see 20/100 uncorrected. Ask your ophthalmologist how bad your vision is in a meaningful way if this is important.

In brief: Difficult
A problem is that the number you receive for your eyeglass prescription does not easily correlate with the snellen fraction (the one that says 20/20 or whatever).
So for instance a +2.00 correction might see 20/40 uncorrected while a -2.00 (note the sign) correction might see 20/100 uncorrected. Ask your ophthalmologist how bad your vision is in a meaningful way if this is important.
Dr. Richard Bensinger
Dr. Richard Bensinger
Dr. Robert Chang
Ophthalmology
2 doctors agree
In brief: Show what you have
Snellen acuity i.
e. 20/20 lists how far you can see something compared to someone with normal vision. E.G. 20/40 means someone can see it at roughly 40 feet what you can see at 20 feet. (has to do with minutes of arc of letters).

In brief: Show what you have
Snellen acuity i.
e. 20/20 lists how far you can see something compared to someone with normal vision. E.G. 20/40 means someone can see it at roughly 40 feet what you can see at 20 feet. (has to do with minutes of arc of letters).
Dr. Robert Chang
Dr. Robert Chang