Vorm appeared to dive beyond Matt Lowton's swerving volley which gave Villa the lead after 16 minutes, with Christian Benteke's late goal sealing Villa's first Premier League win of the campaign.
"It swerved a bit and I saw it a bit late," said Vorm. "I was already moving to my right as well, and I couldn't make up so it was a bit unlucky.
"They make the balls not to please the goalkeeper but to please the players who shoot a lot.
"It's something you have to deal with and you see a lot of times it is hard for the goalkeepers to keep the ball in their hands.
"There are a lot of good players with a good shot and if the ball is wobbling it's not easy.
"But in the Premier League we have good goalkeepers and we have to deal with it.
"It's not really about the ball, I like the ball.
"If you look throughout the season you will see some goals that go in that you think are because of the ball - but I am not going to blame the ball."