Good snow goggles as described in ab2's answer take a while to make.
A quick and dirty way for temporary use can be made with bark. Birch bark is probably easiest to work with, but any smooth bark that you can peel off the tree should work. Try alder and aspen, and willow. You may need to make a baton and pound on the tree some to loosen the bark. Don't bother with conifers: Their sap is sticky.
You want a chunk several inches wide by about 15 inches long. Cut a notch on one long edge to fit around your nose. Put narrow slits for the eyes. Initially make them as narrow as possible, then adjust to be in the right place. If using birch bark you want the full outer bark thickness, not the paper-thin fire starter pieces. It will be about ⅛" to ¼" thick.
A hole at either end allows you to attach cord.
This will stay in place a lot better if you have some elastic in the system. A heavy rubber band works well. You may elastic with you in your tent poles or underwear....
In use, the bottom edge is about even with the bottom of your nose, the top is above your eyebrows.
This doesn't stay in place as well as the Inuit goggles do, but takes only a few minutes to make.
Another thing you can do is to pull any coarse knit fabric, such as a balaclava or toque, down over your eyes. If you are using a finer knit, like a tee shirt, you may want to snip small holes in it. Dark fabric is more effective.
If you only have a white tee shirt you are willing to sacrifice, rub charcoal into it.
If you want the anti-glare effect that football players use, mix charcoal powder with any fat source you have.