How can you be nearsighted, farsighted, and astigmatism?

Not commonly. These are the three basic errors of refraction along with presbyopia which is the farsightedness of older folk. Astigmatism, an ovalness of the eye can coexist with all of these. Near and farsighted are opposites and do not coexist although presbyopia is a type of farsighted which then can exist with underlying myopia. Ask your ophthalmologist to tell you which of these you have.

Related Questions

What does having an astigmatism and nearsightedness in both eyes but also a little farsightedness mean?

Not understanding... You cannot be nearsighted and farsighted in the same eye. Read more...
Confusion. To answer this correctly we would need to see your glasses rx. Often people become confused by our terms. Often people confuse far sightedness with the term presbyopia or loss of near reading vision as we get older. Read more...