Abbkr was found guilty by majority verdict over the attacks in Ealing and Edgbaston in February and March last year, both of which were captured on CCTV.
The victim’s families gave impact statements describing the lasting physical and emotional scars they had been left with.
Mr Ayaz, 38, released the graphic photo of his father’s injuries, saying he wanted the public to see what his family had been through, in the hope it might prevent further attacks.
Although counter-terror police were initially involved, the attacks were not treated as terrorism-related.
Multiple psychiatrists later agreed Abbkr, who came to the UK in 2017 and was granted leave to remain in 2019, has paranoid schizophrenia.
