This is Blind Freddie. Like many Tasmanian possums, Freddie has Wobbly Possum Disease (yes, that is its proper name). Wobbly Possum is a the result of a virus specific to the Common Brushtail Possum. It is spread by contact and slowly interferes with nerve functions. The victim looses balance and becomes confused, and eventually goes blind. There is no cure.
We often used to see Freddie around the place in the evenings. He was quite fearless and would follow us around sometimes in his vague and bumbly way, hoping for kitchen scraps. In his last week we started to see him in broad daylight. Here he is resting on the grass on his last day. He has no idea where he is or whether it is day or night. He wandered off into the bush a bit later and that was the last we saw of him.