DERMOT GALLAGHER pointed out a flaw with the VAR system... it can be littered with "optical illusions".
The former match official was appearing on Sky Sports' Ref Watch to discuss two major incidents in Chelsea's controversial win over West Ham.
In the build up to Pedro Neto's all-important second-half equaliser, Jarrod Bowen was bundled over by Levi Colwill.
No foul was given and play waved on, as Chelsea went up the other end to score.
But the goal itself was also mired in controversy after Marc Cucurella was adjudged to NOT be offside.
Neto whipped the ball across with the left-back in an offside position.
However, there was much debate as to whether Marc Guiu got a flick on the ball en-route to Cucurella.
If he had, then Cucurella would absolutely have been offside.
The ball came across to Neto, who smashed the ball into the back of the net.
After a VAR check, the goal was allowed to stand, with Guiu therefore not adjudged to have got a flick.
Gallagher - who admitted the collision between Bowen and Colwill could perhaps have been a free-kick for West Ham - said it looked as though Guiu got a touch based on a still photo.
However, he called it an optical illusion as he pointed to the fact you couldn't see a touch when watching the video.
Gallagher said: "If he touches it, without doubt Cucurella is offside.
"But you look at it, there's one angle that I think is an optical illusion…
"It looks as though he touches it but it's a still photo and I think still photos can be deceiving.
"You look at it and there's no evidence he's touched the ball.
"So I feel he's duty bound to allow the goal."
Gallagher went on to admit while the foul on Bowen should have been given, enough time had passed between that incident and the goal to not go back and check it.
On the goal, the Premier League commented: "The referee’s call of goal was checked and confirmed by the VAR as there was no factual evidence that Guiu made contact with the ball in the build-up, therefore there was no offside offence."