Karlsson out of PGA Championship

Updated: July 30, 2009, 9:11 AM ET

CROWLAND, England -- Last year's European No. 1 Robert Karlsson will miss next month's PGA Championship after being forced to delay his comeback from an eye problem.

"Robert is so eager to play again but doctor's orders are doctor's orders," the Swede's manager, Lillian Jansson, said Thursday. "He is recovering but not allowed to play yet, apart from practice and very light working out, nothing that can bring on stress."

Karlsson has a form of retinitis, causing a blister behind the left retina, which is blurring his vision.

The 40-year-old will have a medical examination on Aug. 25, when he will find out if he can resume competitive golf this season.

Karlsson took part in last week's Scandinavian Masters pro-am but found he still had a long way to go to be fully fit.

He has not played a tournament since late May. Following further tests at his base Monte Carlo, he has been advised not to play competitive golf until his condition has improved.

The PGA Championship takes place from Aug. 13-16 at the Hazeltine National Golf Club in Chaska, Minn.