Visual function assessment of Chinese cataract patients after individual aspheric intraocular lens implantation according to preoperative cornea spherical aberration

Abstract

BACKGROUND:

Aspheric intraocular lens (IOLs) implantation has been widely applied in cataract surgery. However, there is no consensus on the optimal guidance for the operations in IOLs implantation.

OBJECTIVE:

This study evaluated the visual function of Chinese cataract patients six months after cataract surgery with two different guiding ideologies.

METHODS:

We evaluated 50 patients (61 eyes) with implantation of different aspheric IOLs (SN60WF IOLs, ZCB00 IOLs, PY-60AD IOLs, AO IOLs) 6 months after cataract surgery. Twenty-four patients (30 eyes) under individual implantation were ascribed to group 1 and 26 patients (31 eyes) with randomized implantation were ascribed to the control group (group 2). Postoperatively parameters included monocular best-corrected visual acuity (BCVA), contrast sensitivity (CS), total spherical aberration Z (4, 0) at 5 mm pupil size, and patient satisfaction. The quality of life after operation was assessed through the National Eye Institute Visual Function Questionnaire-25 (NEI VFQ-25).

RESULTS:

Six months after cataract operation, the contrast sensitivity with glare of group 1 at 2.5 ${}^{\circ }$ was 0.697 $\pm$ 0.027, and 0.532 $\pm$ 0.049 in group 2. Besides, there was no significant difference at any other special frequency. The mean spherical aberration Z (4, 0) at 5 mm pupil size in group 1 was 0.015 $\pm$ 0.028 um, and in group 2 was 0.043 $\pm$ 0.109 um, with a significant difference ( $p<$ 0.01). The mean scores obtained from NEI VFQ-25 were not significantly different.

CONCLUSION:

It is effective to implant aspheric IOLs individually according to preoperative corneal spherical aberration. Patients obtained better contrast sensitivity with glare at 2.5 ${}^{\circ }$ , but there was no significant difference in BCVA, contrast sensitivity at other special frequency, and subjective visual function.