A study of more than 6,700 people in the U.S. over age 40 who answered a survey about their sleep revealed possible connections between glaucoma and sleep problems. Glaucoma is a disease of the optic nerve. The study participants were glaucoma patients with evidence of optic nerve damage and vision loss in some portions of their visual field. The study found an association between having glaucoma and having various sleep problems. Among the findings: people who slept for 10 or more hours a night were three times more likely to have glaucoma-related optic nerve damage than those who slept 7 hours a night. Also, the odds of having missing vision were three times higher among people who got 3 or fewer or 10 or more hours of sleep per night, compared with those who got 7 hours a night. Click here to read the full story from the American Academy of Ophthalmology.