1.Comparison of visual performance of monofocal intraocular lenses with different asphericities
Robert Edward T. Ang ; Michel Marco P. Figueras ; Ralph Ernesto U. Geronimo ; Ryan S. Torres ; Mario Gerald A. Padilla Jr ; Emerson M. Cruz
Philippine Journal of Ophthalmology 2022;47(1):31-39
Objective:
To compare the visual performance and patient-reported outcomes of three types of monofocal
intraocular lenses (IOL) with different asphericities.
Methods:
This cross-sectional, comparative study comprised of 62 pseudophakic eyes divided into three
groups corresponding to the IOL that they were previously implanted with (Tecnis ZCB00 negative aspheric
IOL, EnVista MX60 neutral aspheric IOL and Akreos Adapt spheric IOL). Mean refractive spherical
equivalent (MRSE), best-corrected far visual acuity (BCVA), spherical aberration (SA), contrast sensitivity (SC),
halo and starburst, and responses to a qualitative questionnaire (NEI-RQL) were measured.
Results:
There was no significant difference in MRSE (P=0.74) and BCVA (P=0.52) among the three groups.
There was a statistically significant difference (P=0.00) in mean internal (lens) SA, measured through a 5mm
pupil, among Tecnis (-0.150 μm), EnVista (+0.022 μm) and Akreos Adapt (+0.094 μm). Compared to the
Akreos Adapt, the Tecnis and EnVista groups had significantly better CS at 6 CPD and 12 CPD under mesopic
testing without glare (P= 0.01) and at 6 CPD mesopic testing with glare (P=0.04). Halo scores were insignificant
among the three groups. However, starburst scores were significantly worse in the Akreos Adapt IOL than the
Tecnis and EnVista (P=0.01). There was no difference in questionnaire responses among the three groups.
Conclusion
The negative aspheric and neutral aspheric lenses showed significantly lower SA resulting in better
CS in mesopic conditions and better starburst scores. MRSE, BCVA and subjective satisfaction were statistically
similar regardless of the type of monofocal intraocular lens
Contrast Sensitivity