My wife has Alzheimer's and was having great difficulty telling the time.all sadly very normal with the desease.on the advice of mental health a dementia clock was purchased showing time,date,and parts of the day and night i.e. morning,afternoon,evening and night. All very sensible and seemingly good advice, now to my point as very often happens we do not or cannot see things through the eyes of the sufferer. My wife just sees these large numbers i.e. 1.30am 3.oo pm etc. But these are sadly just numbers and does not tell her it is 30minutes to tea time.ten minutes to bed time ,almost time for visitor to arrive. She sometimes reads say 3.20 pm as 20pm not for some reason seeing the large number 3. I wonder if others have purchased these quite expensive items thinking it would solve the problem of telling the time.please don't read this and think I am being negative because to some early sufferers these clocks will be a gift from heaven, but not the magic cure for advanced sufferers.