The two teenagers were described as hunting ‘in a pack’ – going from room to room looking for their victim, before repeatedly stabbing and punching him.
Michael Jones, 18, from Widnes, pleaded guilty to grievous bodily harm and having an offensive weapon and was jailed for nine years.
Liverpool Crown Court heard Jones and two friends, Jamie Grimes, 17, and Lewis Connor, 18, had an ongoing ‘trivial’ dispute with the 17-year-old victim and went in search of him at Riverside College in Widnes on December 7 last year.
John Hatton, head of maths at the college, saw the group prowling the corridors and overheard one of them say: ‘Look in every room lad.’
Maths teacher Kenneth Wong heard a loud bang as Grimes and Jones burst into
his lesson, with someone shouting: “That’s him.”
Jones, of Caldwell Road, walked into a classroom where a lesson was taking place and repeatedly attacked the boy with scissors, stabbing him in the eye, chest and hand.
Cheshire police said the boy was left with life-changing injuries after losing the sight in one eye.
Grimes, who repeatedly hit the victim, was sentenced to five years after admitting causing grievous bodily harm with intent.
Connor was given a 12-month community order for causing fear of violence after admitting using aggressive language in a threatening manner.
Inspector Chris Adkins, of Widnes Local Policing Unit, said: ‘This was a pre-meditated, extremely violent attack, leaving the victim with horrific life changing injuries.
‘Not only has this had a huge impact on the victim but the repercussions were widespread for those who witnessed this atrocious incident take place.
‘The actions of these individuals shocked the local community and I want to thank all those affected for their patience, trust and confidence in the police to help bring these offenders to justice.”