1. For AD group: Clinically diagnosed with Alzheimer's disease (mild to moderate stage) based on Mini-Mental State Examination (MMSE) score between 10-26 and confirmed by PET imaging or CSF.
2. For Control group: No diagnosis of Alzheimer's disease or other neurodegenerative disorders.
Signed informed consent by the patient. If there are any doubts that the patient is mentally capable of giving informed consent, the patient will be examined and verified to be mentally capable by an independent physician/ neurologist, prior to the initiation of any study specific procedure
You may not be if
Severe cognitive impairment (MMSE \<10) preventing cooperation during the imaging process.
Inability to remain still during the fundus imaging procedure.
