I have vision issues too. Since taking my medications (including abilify) I have developed Keratoconus - a thinning and bulging of the cornea. I am convinced this is on account of the medication. I see an opthamologist who wonders about this too. At any rate, I believe my eyesight has been affected.

But, I dare not take myself off the medication. My state of mind is more important to me. And thus, I live with a fine increase in my prescription each year and avoid things like driving between dusk to dawn.

I would in fact start with your GP. They can do a basic examination of your eyes and recommend you see either an optometrist or opthamologist accordingly.