It is a myth that vision stays the same throughout life. Vision is a dynamic sensory-motor system that responds to a wide array of environmental inputs, experiences and activities. The system can be trained and fine-tuned for greater speed and accuracy.
Visual performance skills can be compared to riding a bike. The more you develop and strengthen how to respond visually, the faster and smoother the ride is. You can learn to improve visual skills, like clarity, depth perception, tracking, visual memory, reaction time, peripheral awareness, and many more. More efficient visual skills result in higher levels of performance, particularly for reading and sports.