How old are you? Do lights at night look yellow?
You may be getting early cataracts. They can cause glare problems and can occur in one eye first. You are at the age they can begin developing and you need an eye exam to determine the exact cause. You want to rule out glaucoma and dry eye as well.
Here is a link on cataracts for you: http://www.mayoclinic.com/health/cataracts/DS00050
Hope this helps. You also might start increasing blueberries in your diet, and taking a vitamin/mineral product called ocuvite or its generic. Bilberry is the herbal blueberry form. Let me know how this goes for you. Paula