Duration 5min, Q&A 3min
Impact of IOL Asphericity and Blue Light Filtering on Visual Outcome: Contrast Sensitivity and 2nd-3rd Order Aberrations after Uneventful Cataract Surgery
The aim of the study was to evaluate the effect of asphericity and blue light filter (BLF) of 3 different intraocular lenses (IOLs) on the visual performance, 2nd and 3rd order aberrations (defocus, coma, trefoil) and contrast sensitivity after uneventful cataract surgery.
Sixty eyes of sixty patients undergoing cataract surgery were assigned randomly to receive three IOL types: Bioline Yellow Accurate (aspheric, with BLF, i-medical, Germany), BioAcryl 60125 (spherical, without BLF, Biotech, France) and H65C/N (aspheric, without BLF, PhysIOL, Belgium). Each IOL was implanted in 20 eyes.
Complete ophthalmic examination, including best corrected and uncorrected visual acuity measurement, functional acuity contrast testing (FACT-Optec6500, Stereo Optical Inc., USA) and wavefront analysis (Zywave, Bausch & Lomb, Germany) were performed at a time point 60 days after surgery.
Results and Conclusion
The mean postoperative best corrected visual acuity (BCVA) was 0.95 ± 0.08 not differing statistically between IOL groups (p=0.83). Mean defocus and coma values did not yield any statistically significant difference through IOL groups varying from -0.784 to -0.614 and 0.129 to 0.198 respectively (p=0.79 and 0.34 respectively). Bioline Yellow Accurate presented less trefoil aberrations, 0.108 ± 0.05, rather than the other two IOL types (BioAcryl [0.206±0.19] and Physiol [0.193±0.17], p<0.05). Contrast sensitivity values did not differ between the groups under all lighting conditions, whether Bioline Yellow showed a statistically higher loss of contrast sensitivity (between mesopic without and with glare conditions) compared to the BioAcryl and PhysIOL in 12 and 3 cpd spatial frequencies respectively (p<0.05).
The IOL with BLF (Bioline Yellow) indicated a greater loss of contrast sensitivity under mesopic glare conditions and resulted in less trefoil aberrations after successful cataract surgery.
[ Keyword ]
blue light filtering / aspheric IOL / contrast sensitivity / aberrometry
[ Conflict of Interest ]