Glaucoma is the leading cause of blindness in individuals over the age of 60, and is extremely common with people who are diabetic. There is an increased intraocular pressure which causes tunnel vision, and if not addressed with proper glaucoma treatment, will lead to blindness. There are no early warning signs of glaucoma. Yearly visits to the best ophthalmologist near you for eye exams will ensure healthy vision, no vision loss as well as keeping you up to date on the well-being of your eye.