Is astigmatism treatable?

Most certainly: Astigmatism is a condition where the cornea is off-round in one or more planes. It is treated very successfully with corrective lenses that correct for the visual distortions caused by the mal-shapen cornea. Astigmatism can also sometimes be treated surgically with laser surgery and other techniques. See your local eye care professional to see what options might be best for you.

Yes: Refractive correction, i.e. Glasses, contacts, laser, incisions, implants, etc. Should distinguish regular vs. Irregular through topography.