Well, both the 10x30 and the 10x70 binoculars provide the same magnification. However, the 10x70 binoculars will provide you with the brighter, more detailed view, since the 10x70s have 70mm objective lenses, whereas the 10x30 binoculars only have 30...
There are binoculars especially made for people who wear glasses. I know. I wear glasses and have two pair. What you want to look for is a pair of binoculars that have at least 17 mm eye relief. I suggest a pair of 8x40 or 8x30 depending on the weigh...
Zooms are terrible and Binoculars don't work much for astronomy Get a small telescope instead. $273 will buy you a nice scope Otherwise just get a $100 pair of Bushnell or something. 7x35 or 10x35 or 15x50