Does anyone know if an optometrist would be able to check the eyes of an Alzheimer's patient?

Best bet is for your to contact your Mom's primary doctor to see who he/she would recommend.

Otherwise contact your local agency on aging to see if they have a list of eye doctors who can work with an Alzheimer's patient. If you live in the States, go to the website link below.... click on your State.... now click on the city/county. https://www.agingcare.com/local/Area-Agency-on-Aging