RESULTS	The peak of IOP elevation was between postoperative 6-12 hours , over 2.80 kPa ( 1 kPa = 7.5 mmHg ) and > or = 4.0 kPa were in 31 eyes ( 53.45 % ) and 4 eyes ( 6.90 % ) respectively , and the highest IOP was 4.40 kPa .\