There are several types of eye problems and visual disturbances. These include blurred vision, halos, blind spots, floaters, and other symptoms. Changes in vision, blurriness, blind spots, halos around lights, or dimness of vision should always be evaluated by a medical professional. Such changes may represent an eye disease, aging, eye injury, or a condition like diabetes that affects many organs in your body. For the most severe form of visual loss, see blindness. http://www.nlm.nih.gov/medlineplus/ency/article/003040.htm