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Nicholas Tarantino, Srividhya Vilipuru, Robert Ang; Effect of Small Aperture Intra-ocular Lens on Visual Fields. Invest. Ophthalmol. Vis. Sci. 2016;57(12):1305.
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© 2017 Association for Research in Vision and Ophthalmology.
To evaluate visual acuity and localized changed in visual field following implantation of the small aperture hydrophobic acrylic intraocular lens (IC-8 IOL, AcuFocus Inc., Irvine, CA) patients in in aphakia patients in whom a cataractous lens has been removed by phacoemulsification or femtosecond assisted extraction.
Ongoing prospective evaluation in which, the IC-8 IOL and a monofocal IOL were implanted in 21 and 9 eyes of 15 subjects respectively. Standard visual field tests were performed using the Ziess Humphrey 24-2 SITA in both eyes at 6 months post-op. Standard clinical examination including distance and near vision measurements. Visual field indices Mean Devistion (MD), Pattern Standard Deviation (PSD), fixation losses (FL), false positives (FP), and false negatives (FN) were evaluated and compared using t-tests between implanted and fellow eyes after IOL implantation. All data are presented as logMAR mean ± sd.
Uncorrected distance, intermediate and near visual acuity at six months was 0.03 ± 0.08 (20/21), 0.00 ± 0.08 (20/20) and 0.08 ± 0.11 (20/24) respectively. PSD in the IC-8 eye was 1.84 ± 0.45 and in the monofocal eye it was 1.93 ± 0.32db (p = 0.601). MD in the IC-8 eye was -3.77 ± 1.01 and in the monofocal eye it was -2.61 ± 2.14db (p = 0.051). Standard achromatic perimetry (SAP) reliability indices were not significantly different between IC-8 and monofocal eyes.
Implantation of a small-aperture intraocular lens improves uncorrected monocular visual acuity at all distances. Additionally, implantation of the small-aperture IOL does not cause any localized scotomas in the visual fields as demonstrated by the lack of difference in PSD when comparing the implanted and non-implanted eye.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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