As my eyesight has gotten worse from macular degeneration, I've started to see hallucinations of people.  I know they're not real, but I'm worried this may be the start of Alzheimer's.  Are there other explanations?
D006212:Hallucinations / Q000209:etiology*; D006801:Humans; D008268:Macular Degeneration / Q000150:complications*; D014786:Vision Disorders / Q000209:etiology*