A cataract usually starts very small and practically unnoticeable but grows gradually larger and cloudier. Your eye doctor is probably waiting until the cataract interferes with your vision and your lifestyle. You need to continue to visit your eye doctor regularly so the cataract's progress is monitored. If your cataract is interfering with your vision to the point where it is unsafe to drive, or interfering with your daily tasks, then it's time to discuss surgery with your eye surgeon.