The Blues enjoyed a double dose of outrageous fortune to keep their slim Barclays Premier League hopes alive and all but kill off Spurs' chances of qualifying for next season's Champions League and earning another ?£30million jackpot.
Redknapp said: "He's (the assistant Mike Cairns) made a mistake and it happens all the time. Until we get technology, it'll keep happening."
Tottenham were leading 1-0 through Sandro's first goal for the club when Cairns wrongly ruled Heurelho Gomes had spilt Frank Lampard's shot over his own line. That was compounded in the 89th minute when colleague Martin Yerby failed to spot Salomon Kalou was offside when netting the winning goal.
Redknapp's anger was vented more at the game's lawmakers than the officials, although he did accuse Cairns of "guessing" and of being influenced by the Stamford Bridge crowd when awarding Lampard's equaliser.
"He's on the 18-yard line when the ball's on the goal-line," Redknapp said. "It's impossible to judge. No-one in this world can be sure if it's crossed the line or not.
"He's had a guess and he's guessed wrong. It was an honest guess, he hasn't done it purposely because he wanted Chelsea to win or Tottenham to lose."
Ironically, Lampard was the same player famously denied a goal in England's World Cup thrashing by Germany last summer.
Redknapp added: "When Frank Lampard can hit a shot that goes two foot in the back of the goal and they don't give a goal, it shows you it will continue to happen.
"It takes five seconds to get the right decision. What is wrong with getting the right decision?"
Source: PA
Source: PA