Abstract
Purpose::
: To compare visual performance, total and high order wavefront aberrations (coma, spherical aberration and other terms of HOA) and contrast sensitivity under different light conditions in patients implanted with one aberration free IOL (Sofpot AO) in one eye and a spheric IOL (Soflex SE) in the other eye.
Methods::
A multicentric randomized prospective study comparing SofPort AO (44 eyes) and Soflex SE (44 eyes) was carried out at three ophthalmologic centre in Brazil. The cataract surgeries were performed by three experienced surgeons. Complete ophthalmologic exam including UCVA, BSCVA, distance-corrected near visual acuity, corneal topography, contrast sensitivity (FACT - Optec® 6500) and wavefront analysis were performed preoperatively, 30 and 90 days postoperatively. The Optec contrast sensitivity test was performed under photopic and mesopic conditions, with and without glare. Patients with PAM worse than 20/32, any ocular pathology or surgical complications were excluded. Statistical analysis was performed using parametric tests and p≤0.05 was considered statistically significant.
Results::
All eyes in all groups had postop BSCVA≥ 20/25. The SofPort AO IOL showed statistically significant less spherical aberration and lower values of total and HOA when compared with the spherical IOL (p<0.05). Mean HOA 5mm values were: 0.42±0.21µm (SofPort AO) and 0.54±0.30 µm (Soflex SE). Mean spherical aberration values were: 0.16±0.06µm (SofPort AO) and 0.23±0.10 µm (Soflex SE). No statistically significant differences were found between the groups regarding defocus, coma, astigmatism, trefoil and tetrafoil. Mean logMar distance-corrected near visual acuity was: 0.49±0.15 in SofPort IOL group and 0.48±0.17 in Soflex SE group. The SofPort AO showed better results in 3 and 6cpd spatial frequencies in mesopic and mesopic with glare conditions using FACT-Optec 6500(p=0.008), although there were no statistical differences in photopic condition.
Conclusions::
The aspheric IOL SofPort AO showed significantly less spherical aberration and HOA when compared to the spherical IOL analyzed in this study without compromising depth of focus. The SofPort AO group also presented better contrast sensitivity under mesopic and mesopic with glare conditions.
Clinical Trial::
www.clinicaltrials.gov NCT00347243/ CEP 012/06
Keywords: depth • contrast sensitivity • refractive surgery: phakic IOL