MARK WILLIAMS is considering cancelling major eye surgery after making World Championship history.

The Welshman, 50, pipped fellow Class of 92 snooker legend John Higgins 13-12 to .

Mark Williams speaks to the media.Mark Williams gave a post-match interview in glasses following an epic win but has yet to play in them during matchesJohn Higgins at the World Championship snooker match.John Higgins won four frame sin a row but Williams nicked it 13-12

But suggested he was playing “half blind”; as he battled with deteriorating eyesight.

The three-time world champion had planned an operationto fix the problem.

But his continuing progress is giving him second thoughts.

Williams will now face World No.1 , starting on Thursday.

And he digested the question of his worseningvision as he analysed his .

BBCpundit Ken Doherty noticed Williamswas wearingglasses for their interview.

And the Irishman, who won theworld title in 1997, joked that Higgins’ conqueror wasn’t “playing bad for a blind man”;.

Far from shy away from thematter, Williams opened up on his tricky situation.

He said: “I’ve got a big decision to make now, do I cancel my op? I don’t know.”;

Asked how his eyesight had affected his game at the Crucible, Williams added: “I haven’t played with glasses yet, that was my next step.

“I tried contacts, struggled with them. Looks like I’m still doing alright, half blind.”;

Williams survived reeling off four frames in a row to level at 12-12 by nicking the final frame 74-69.

The third Class of 92 member, Ronnie O’Sullivan is also into the last four.

The Rocket, 49, booked a clash with Zhao Xintong by overcoming Si Jiahui 13-9.