Abstract
Purpose :
Higher-order aberrations within pupils during photopic and mesopic contrast sensitivity examinations have not been evaluated. In this prospective case series, pupil diameters and visual functions under different illumination levels in eyes after contralateral implantation of blue and violet blocking intraocular lenses (IOLs) were evaluated using a ray-tracing aberrometer.
Methods :
During cataract surgery in 35 patients (ages ranging from 57 to 89 years), aspheric blue-blocking IOLs and violet-blocking IOLs were implanted contralaterally. The pupil diameters, higher-order aberrations (HOAs), and contrast sensitivities under photopic (170 lux), mesopic (5 lux), and intermediate (50 lux) illuminations were measured 1 month postoperatively. HOAs within the actual pupil diameters were measured using a ray-tracing wavefront aberrometer (iTrace, Tracey Technologies, Houston, TX, USA). The measured pupil diameters, HOAs, and contrast sensitivities were intra-individually compared.
Results :
The mean postoperative best-corrected visual acuities were 1.23 and 1.30 in decimal notation in the eyes with blue- and violet-blocking IOLs, respectively. The pupil diameters in the eyes with violet-blocking IOLs were significantly smaller under intermediate illumination (P=0.036, paired t-test), while there was no significant difference in the HOAs. In the contrast sensitivities, there were significant differences in 12 and 18 cpd under the mesopic and photopic illuminations, respectively. The eyes with violet-blocking IOLs resulted in higher areas under the logarithm contrast sensitivity function under the mesopic illumination (P=0.02).
Conclusions :
Contralateral evaluations of pupil diameters and visual functions using a ray-tracing aberrometer revealed pupillary responses due to different light-blocking properties. Nevertheless, the effect of the pupil diameter on the HOA and contrast sensitivity was not found within the limited sample number.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.