The surgical keratoscope and Terry surgical keratometer were used in 29 (group a) and 34 (group b) eyes respectively during cataract extraction with PC IOL implantation to monitor the corneal astigmatism and to adjust the tension of sutures. Two weeks after the operation, the corneal astigmatism in group a was 3.50 +/- 1.70D, and that in group b was 2.56 +/- 1.60D. Two months after the operation, 55.2% of the eyes in group a and 38.2% of the eyes in group b had corneal astigmatism > 2.00D, differing significantly from the higher percentage in the controls. The authors opined that the intraoperative use of the surgical keratoscope and Terry surgical keratometer helped reduce the corneal astigmatism following the intraocular operation.