The average age for cataract surgery is approximately 73 to 75 years old. But cataracts can occur in the 30s, 40s, and 50s. Of course the older the patient gets the more common the cataracts.
Two neurotransmitters seem to play a role in Alzheimer's Disease: acetylcholine and glutamate. Acetylcholine (ACh) activates muscles and helps with arousal, short-term memory, and learning. Individuals with AD have low levels of ACh.
This structure relies on acetylcholone to function properly. Alzheimers disease reduces the amount of acetylcholone in this area of the brain. of the brain, and electrical stimulation to these areas can produce memory, or dream-like experiences.