@mothninja My dad lost his eyesight due to glaucoma. He became depressed, and suffered from dementia (this was back in the 1990s). What helped him was music; he used to be a musician, so listening to music made him happy, even if he wasn't making it himself. Also, we didn't have it then, but if your dad's hearing is still functioning, try audio books, or audio anything. Also some health and veteran's organizations offer workshops and retreats to help people deal with vision loss.