Vol. 47 No. 1 Original Article PDF

Comparison of Visual Performance of Monofocal Intraocular Lenses with Different Asphericities

Robert Edward T. Ang MD1,2, Michel Marco P. Figueras MD2, Ralph Ernesto U. Geronimo MD1, Ryan S. Torres MD1, Mario Gerald A. Padilla Jr MD1, Emerson M. Cruz, MD1

1Asian Eye Institute, Makati City
2Department of Ophthalmology, Cardinal Santos Medical Center, San Juan

Correspondence: Robert Edward T. Ang, MD
Asian Eye Institute, 8th Floor PHINMA Plaza, Rockwell Center, Makati City, Philippines 1200
Email: rtang@asianeyeinstitute.com

Disclaimer: The authors report no financial interest related to this study or any products described in this paper.


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.

Keywords: Spherical Aberration, Asphericity, iTrace, Contrast Sensitivity

Philipp J Ophthalmol 2022;47:31-39