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Purpose To report refractive outcomes of scleral-fixated intraocular lens (IOL) implantation with Gore-Tex (W.L. Gore & Associates, Newark, DE) suture and combined pars plana vitrectomy and compare predicted refractive outcomes among 5 IOL power calculation formulas. Design Retrospective case series. Participants Patients undergoing scleral-fixated IOL implantation with Gore-Tex suture at our institution between January 2015 and June 2018. Methods Comparison of preoperative biometrics with postoperative refraction and calculation of predicted refractive outcome with 5 different IOL formulas. Main Outcome Measures Prediction error and absolute error to compare postoperative refraction with refraction predicted by lens power calculation formulas. Results Thirty-one eyes of 31 patients were included. All power calculations assumed in-the-bag position of the IOL. The Akreos A060 (Bausch & Lomb, Rochester, NY) was implanted in 23 eyes and the CZ70BD (Alcon, Fort Worth, TX) in 8 eyes, and all lenses were sutured 3 mm behind the limbus. Average postoperative spherical equivalent (SE) was –0.79±0.95 diopters (D). Average prediction error (postoperative SE refraction minus target refraction) was –0.19±0.72 D. Postoperative SE was within 1.0 D of target in 25 of 31 patients (81%) and 2.0 D of target in 31 of 31 patients (100%). The repeated-measures analysis of variance of absolute error by lens power formula was significant (P = 0.012), with Haigis demonstrating greater error. There was no significant difference among Barrett II, Sanders-Retzlaff-Kraff theoretical (SRK/T), Holladay 2, or Hoffer Q. Conclusions For eyes undergoing pars plana vitrectomy with scleral-sutured IOL implantation, assumption of in-the-bag IOL position when calculating lens power leads to acceptable refractive outcomes. Barrett II, SRK/T, Holladay 2, and Hoffer Q formulas were noninferior to each other.

Introduction and objectives: Although computed tomography angiography (CTA) is commonly used preoperatively to determine arterial anatomy, duplex ultrasound (DUS) vein mapping is frequently used to determine the suitability of bypass conduits. The purpose of this studywas to determine the correlation between DUS and CTA in the evaluation of the great saphenous vein (GSV) with respect to diameter and usability in lower extremity bypasses. Methods: A single-center retrospective review identified patients who had both CTA and DUS in preparation for lower extremity bypass, between June 2001 and February 2012. DUS reports included GSV diameter at the saphenofemoral junction, midthigh, knee, andmidcalf. CTAs were reviewed independently by two vascular surgeons who were blinded to the DUS and surgical findings. The interobserver variability was analyzed using Pearson correlation. The relationship between CTA and DUS measurements was compared at each anatomic level using correlation coefficients. The predictive ability of CTA was analyzed using the Fisher exact test. Results: Sixteen patients (9 men [56.3%]) underwent CTA and DU in preparation for lower extremity bypass (23 limbs). The average patient age was 65.1 years, 10 (62.5%) were diabetic, and three (18.8%) had a history of DVT or phlebitis. A high degree of correlation existed between the two surgeons’ GSV measurements using CTA (r .09996, P .0001), and a strong correlation existed between CTA and DUS GSV measurements (r .07306, P .0001). CTA assessment of GSV usability correlates with actual usage as conduit (P .0099) with a sensitivity of 92% and sensitivity of 80%. Conclusions: CTA can be accurately used to evaluate the diameter and usability of the GSV for lower extremity revascularization, eliminating the need for additional testing.