| [Purpose] To compare wavefront aberrations (high — order, coma, spherical aberration), and contrast sensitivity in eyes implanted with two different types of aspheric intraocular lens (IOL) and one spherical IOL.[Methods] This is a prospective clinical study. 57 patients (61 eyes) were to receive three IOL types: two aspheric intraocular Lenses of AcrySof IQ (SN60WF) and Tecnis Z9001, and one spherical Acrysof Natural (SN60AT). Complete ophthalmologic examinations were performed preoperatively, 1 day, 1week, and two months postoperatively. Best-spectacle corrected visual acuity (BSCVA), wavefront analysis and contrast sensitivity were performed two months postoperatively.[Results] After 2 months, all eyes had postoperative BSCVA >20/30. The AcrySof IQ IOL, as well as the tecnis Z9001 IOL, showed statistically significant less induction of spherical aberration (P <0.05) when compared with the AcrySof Natural IOL, and had no difference in high-order aberration and coma. There was no statistically significant difference in high-order aberration, spherical aberration and coma between the two aspheric IOLs. The contrast sensitivity values were tested both in light-off and light-on conditions. In light-off condition, the two aspheric IOLs showed better results in low spatial frequency (IQ: 6.3degrees; Tecnis: 4.0degrees) than AcrySof Natural IOL (IQ: p<0.05; Tecnis: p<0.05). And in light-on condition, the two aspheric IOLs also showed better results in low spatial frequency (IQ:6.3degrees; Tecnis: 6.3degrees) than spherical IOL(IQ: p<0.01; Tecnis: p<0.01). Between the two aspheric IOLs, there was no difference both in light-off and light-on.[Conclusion] The clinical results indicate that the aspheric IOLs can eliminate the spherical aberration of the eyes after cataract surgery, and improve the contrast sensitivity. But there was no statistically significant difference between the two aspheric intraocular lenses in different designs. |
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