The comparison of higher-order aberration and contrast visual after the aspheric and spherical intraocular lens implantation

Abstract

AIM: To compare the difference of wavefront aberration, uncorrected visual acuity(UCVA), best-corrected visual acuity(BCVA), contrast visual acuity between aspheric intraocular lens and spherical intraocular lens after implantation.METHODS: Totally 46 patients(50 eyes)with age-related cataract were divided into 2 groups at random, one group of 23 patients(24 eyes)received ACR6D SE spherical intraocular lens(Group A), another group of 23 patients(26 eyes)received negative spherical aberration Acri.Smart 36A aspheric lens(Group B). Three months after surgery, we observed patient's UCVA, BCVA, the contrast vision of dark background(25cd/m2)and highlighted background(255cd/m2), the spherical aberration, coma and total high-order aberration RMS'(pupil's diameter was 6mm)differences between two groups. RESULTS: The differences of UCVA and BCVA between the two groups were not significant. There was no significant difference in the contrast visual acuity of 100% and 25% between highlighted background and dark background, however, under dark background, the contrast visual acuity of 5% and 10% in Group B was better than Group A. When the pupil diameter was 6mm, root-mean-square(RMS)of higher-order aberration, spherical aberration and comatic aberration in Group A were significantly lower than Group A and difference was statistically significant. CONCLUSION:Acri.Smart 36A aspheric intraocular lens can significantly reduce patients' wavefront aberration and improve contrast visual acuity under lower contrast of dark background when compared with ACR6D SE spherical intraocular lens.

Keywords

• aspheric
• spherical aberration
• intraocular lens