Cinical Outcomes of High Parameter Versus Low Parameter Phacoemulsification

1. Jun Hun Lee M.D.¹
2. Joon Ho Park M.D.¹
3. Young Soo Cho M.D.²
4. Hong Kyun Kim M.D.,Ph.D.¹

¹Kyungpook National University Hospital, Daegu, Republic of Korea
²Daegu Eye Clinic, Daegu, Republic of Korea

Purpose : To compare the clinical outcomes between high parameter and low parameter phacoemulsification cataract surgeries
Methods: Senile cataract patients with nuclear density grade 3~5(by lens opacities classification system III) were randomly assigned. Preoperative factors(age, gender, cataract grade, visual acuity, central corneal thickness, endothelial cell count), intraoperative factors(cumulative dissipated energy, fluid consumption, ultrasound time, pupil size change), postoperative factors(visual acuity, central corneal thickness, endothelial cell count) were compared between 2 groups.

Results: 27 eyes in the low parameter group, 24 eyes in the high parameter group completed this study. There were no difference in preoperative factors. Although they were not statistically significant, cumulative dissipated energy and ultrasound time were higher in the low parameter group, and wound incarceration rate were higher in the high parameter group. The change of pupil size was significantly higher in the high parameter group. The changes of visual acuity, central corneal thickness, endothelial cell count were not significantly different between 2 groups.

Conclusions : In high parameter settings, operation time is reduced. In lower parameter settings, anterior chamber is more stable and effects on ocular tissues are less than high parameter settings.