He also suffered a broken jaw.
Devon and Cornwall Police say a 24-year-old man has sustained serious, potentially life-changing head injuries after an attack in the early hours of last Sunday morning (8th December).
Police would like to hear from anyone who saw what happened on South Street in Exeter - just outside Z cars and taxis at 2am.
The victim also suffered a broken jaw in the assault.
Anyone with any information is urged to contact 101 quoting crime reference number, CR/110277/19.
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