Something slightly different. I use a pair of 6x high-magnification eyeglasses for ground glass focusing. Also for inspection of smaller roll film negatives on the light table.

These glasses are are intended for people with severe eye issues. But the upside is that they allow comfortable true binocular vision in a totally hands-free environment. Very useful under the darkcloth. And they are very inexpensive to replace should you lose or break them.

Ken