June-July 2020


Journal of Cataract & Refractive Surgery
In the journal: June/July 2020

Visual function and subjective perception of vision following bilateral implantation of monofocal and multifocal intraocular lenses: a randomized controlled trial

Elizabeth Law, MSc, Rajesh Aggarwal, BM, Hetal Buckhurst, PhD, Hosam Kasaby, MBChB, Jonathan Marsden, PhD, Gary Shum, PhD, Phillip Buckhurst, PhD
A prospective, randomized, double-masked clinical trial evaluated monocular and binocular vision in patients who received either bilateral multifocal (Bi-Flex 677MY, MediContur) or monofocal (Bi-Flex 677AB, MediContur) IOLs. One hundred patients were assessed at different time points for distance, intermediate, and near visual acuity as well as defocus curve profiles. Secondary outcomes such as reading speed, contrast sensitivity, and subjective quality of vision were also recorded. Uncorrected and corrected near vision was significantly better with multifocal IOLs compared to the monofocal group. Uncorrected and best corrected distance visual acuity was comparable between the two groups, and the research reported no significant difference between the groups in distance-corrected intermediate visual acuity. Defocus curves showed an increased range of focus in the group with multifocal IOLs. Halos were more significant in the multifocal group, though the study authors noted that it didn’t appear to impact patients’ subjective satisfaction with the IOL.

Cataract surgery in patients with left ventricular assist devices

Cassandra Brooks, MD, Nandini Venkateswaran, MD, Kevin Cox, FNP-BC, Terry Kim, MD
A retrospective case series of 31 patients with left ventricular assist devices (LVADs) evaluated the safety of cataract surgery (53 cataract surgeries included in the review). The review was conducted using information from electronic medical records for patients with LVADs who had cataract surgery between March 2012 and August 2019 at the Duke Eye Center in Durham, North Carolina. Femtosecond laser, intraoperative aberrometry, and/or an advanced technology IOL was used in 47.2% of cases. Most patients (51.6%) were on warfarin, 45.2% on warfarin and aspirin, and 3.2% on warfarin and clopidogrel. An LVAD team monitored topical anesthesia for these cases, and there were no adverse events related to LVAD in the cases. No hospitalizations or deaths that could be attributable to the cataract surgery were found at 30 days postop. At 1 month postop, 61.1% of eyes were within 0.5 D of target spherical equivalent. These findings, overall, led the study authors to conclude that cataract surgery was safe and feasible for patients with LVADs; the LVAD was not a contraindication to cataract surgery.

Predictive and construct validity of virtual reality cataract surgery simulators

Zacharia Nayer, BA, Braedon Murdock, BS, Ishaan Dharia, BA, David Belyea, MD
This literature review, which included 20 articles, assessed the potential of virtual simulators in cataract surgery training. Eleven articles looked at construct validity of virtual reality surgical simulators, while nine looked at predictive validity. Ultimately, the study determined that virtual reality simulation can help differentiate surgical experience and improve operating room performance, though the authors note the construct validity of some simulators has yet to be established by many studies. Eyesi (VRmagic), conversely, the study authors reported, has been validated. The study authors suggest that this review supports the use of virtual reality simulation in ophthalmology residency.

Journal of Cataract & Refractive Surgery In the journal: June/July 2020 Journal of Cataract & Refractive Surgery In the journal: June/July 2020
Ophthalmology News - EyeWorld Magazine
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