Ghosting of vision (night light;reading white text in black background) in eyes. Doc checked cornea and lens with slit lamp: no issues. Astigmatism?

Yes. Astigmatism occurs when the cornea is not perfectly spherical. If the shape is more like an egg, you have astigmatism and this creates "ghosting" as you've described. A refraction would tell if this is the problem and glasses could solve your difficulty.