Effects of Intraocular Lens Opacification on Light Scatter, Stray Light, and Overall Optical Quality/Performance.

Purpose: To evaluate light scatter and stray light in intraocular lenses (IOLs) explanted because of postoperative opacification (13 calcified hydrophilic acrylic, 1 calcified silicone, and 4 polymethylmethacrylate [PMMA] lenses with snowflake degeneration), as well as effect of opacification on other optical quality/performance indicators, in comparison with controls.

Methods: The Complete Angle Scatter Instrument (CASI) scatterometer was used to measure the forward light scattering (FLS) of the IOLs, and the stray light values at various angles were calculated from the measured FLS. Modulation transfer function (MTF) was obtained with an optical bench, and a Badal optometer was used to obtain letter chart images through the lenses.

Light scattering, straylight, and optical quality in hydrophobic acrylic intraocular lenses with subsurface nanoglistenings.

Purpose: To evaluate forward light scattering and straylight in single-piece hydrophobic acrylic intraocular lenses (IOLs) (Acrysof) removed from cadaver eyes and design- and power-matched controls, as well as the effect of subsurface nanoglistenings on other optical quality and performance indicators.

Setting: John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.

Blood conservation techniques: where to begin.

Blood conservation techniques are used to reduce the need for allogeneic blood transfusion. One of the most important blood conservation techniques is the optimization of blood counts prior to invasive procedures with anticipated blood loss. Infusion nurses need to understand the importance of treating patients who require the use of parenteral iron to attempt to optimize their blood counts before procedures.

Technique for measuring forward light scatter in intraocular lenses.

Purpose: To develop a technique for measuring the forward light scattering of intraocular lenses (IOLs).

Setting: The Scatter Works, Tucson, Arizona, USA.

Design: Evaluation of diagnostic technique.