Preservision AREDS 2 Formula Soft Gels are a dietary supplement that contains a specific combination of vitamins and minerals that have been clinically shown to help reduce the risk of progression of moderate-to-advanced age-related macular degeneration (AMD). AMD is a leading cause of blindness in people over the age of 50. It damages the macula, the central part of the retina that is responsible for sharp central vision. As AMD progresses, people may experience blurred vision, difficulty seeing in low light, and central blind spots.