PERIPHERAL VISIONSit in a place outside your house, such as on a park bench or in a café. Stare straight ahead and don't move your eyes. Concentrate on everything you can see without moving your eyes, including in your peripheral vision. When you have finished, write a list of everything you saw. Then try again and see if you can add to your list. Scientists have shown that the neurotransmitter acetylcholine, which is crucial to focus and memory, falls off with memory loss and is almost absent in Alzheimer's patients. This activity should help you reinvigorate the controlled release of acetylcholine in your brain through a useful visual memory task.