The Briton suffered a broken eye socket in a fifth-round defeat to Gennady Golovkin last September and surgery meant putting back a defence of his IBF world welterweight title against mandatory challenger Errol Spence.
Brook's trainer Dominic Ingle last week compared the injuries to those suffered by car crash victims, while the Sheffield boxer was even told at hospital it could have cost him his sight.
"They took my eye out and went in through my mouth and into my eye to get the titanium plate put in place," Brook told ESPN.
"They then drilled in three or four screws. That's what it were, pretty gruesome, but that's what were necessary. Everything is fine now and there are no worries about getting hit there.
"Boxers put themselves on the line, they put their lives at risk, so it's up to the boxers to make sure they are healthy and sharp because we are giving the public what they want to see."
