Many of us have to wear glasses when we play golf, especially senior golfers. Yet, I would confidently say that the majority of these golfers are probably wearing the wrong kind of frames or lenses.
Whether you wear bifocals, trifocals, or some sort of specialty lenses, the impact your glasses have on your golf game should not be overlooked. One of the trends I'm seeing lately is small, skinny frames. This is one of the worst things you can wear, since the frames will cut off your direct line of sight to the ball when you are getting set up. Make sure your glasses come down to your cheeks, otherwise you'll have to compensate by bending over.
If you wear sunglasses, make sure they come down to your cheeks as well. It's important to protect your eyes from sunlight, but they have to follow the same guidelines as your regular glasses. I like to wear transition lenses when I play because they automatically adjust their tint based on the amount of light present.
If you haven't been playing well and can't figure out why, don't forget that having the right set of glasses is just as important as any other piece of equipment that you use!
Keep it vertical!