Abstract: Objective To study status of ametropia after penetrating keratoplasty. Methods Optometry was performed for 20 patients with opened pupils three months after penetrating keratoplasty. Results There were 11 eyes of which the visual acuity after penetrating keratoplasty≤0.1, and their corrected visual acuity were 0.05～1.0; there were 9 eyes of which the visual acuity after penetrating keratoplasty≥0.2, and their corrected visual acuity were 0.6～1.2. 15 eyes had astigmatism and 9 eyes were high astigmatism(>3D). 8 eyes were upright axis. There were 7 eyes of which the best corrected visual acuity>1.0 all had the astigmatism, among them 4 eyes were upright axis. Conclusion The corrected visual acuity after penetrating keratoplasty improved significantly. Most cases have high astigmatism with the upright axis. The cause could be that suture are tightened more at 6 and 12, which make tugging to part of cornea, leading to astigmatism with upright axis.

Key words: penetrating keratoplasty, ametropia, astigmatism