関連する実験動画

Updated: Jan 23, 2026

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Scanning Light Scattering Profiler SLPS Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses

Published on: June 6, 2017

2種類の延長焦点眼内レンズ（SymfonyおよびVivity）の視覚および主観的結果の比較：薄明かり下での性能に焦点を当てて

Joaquin O De Rojas¹, Helga P Sandoval², Richard Potvin³

¹Center For Sight/US Eye, Sarasota, FL, USA.

Journal of cataract and refractive surgery

|January 21, 2026

要旨

Purpose:

To evaluate outcomes after implantation of two extended depth of focus IOLs, with emphasis on performance in dim light.

Setting:

Two clinical practices in the USA.

Design:

Prospective, double masked, randomized clinical trial.

Methods:

Subjects were randomized to receive Symfony Optiblue or Vivity IOLs. Objective optical quality, aberrations, and simulated visual disturbances were measured before and 3 months after surgery. Binocular visual acuity (VA), the defocus curve and low contrast VA were measured under mesopic lighting conditions. Patient questionnaires were administered and undirected patient comments were recorded.

Results:

Thirty-one subjects in each group completed the study. Refractive outcomes were not significantly different. The Symfony lens provided about a half line better monocular mesopic VA at distance when uncorrected and best corrected (p < 0.05). There were no differences in binocular visual function between lenses except for the mesopic defocus curve at -1.00 D and -1.50 D, with the Symfony lens providing better VA at those vergences (p < 0.02). Objective optical measures improved after surgery, with improvements not different by group. There were no differences in the size or intensity of simulated glare, but simulated halos and starburst size and intensity were significantly worse with the Symfony lens (p < 0.05). Satisfaction with distance and intermediate vision in both groups was high. Reported visual disturbances were not significantly different between groups.

Conclusions:

The two lenses provided similar visual performance in dim light, with the Symfony lens showing slightly better VA, but with more reports of halos and starbursts.

キーワード:

延長焦点眼内レンズ Symfony Vivity 薄明かり下の視力視力ハロースターバースト

さらに関連する動画

Measuring the Behavioral Effects of Intraocular Scatter

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

Performing Behavioral Tasks in Subjects with Intracranial Electrodes

Performing Behavioral Tasks in Subjects with Intracranial Electrodes

Published on: October 2, 2014

関連する概念動画

Predicting Reaction Outcomes

Predicting Reaction Outcomes

Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...

The Sense of Self: Reflected Self-Appraisal and Social Comparison

The Sense of Self: Reflected Self-Appraisal and Social Comparison

According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...

Outcomes of Glycolysis

Outcomes of Glycolysis

Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...

Uniform Depth Channel Flow

Uniform Depth Channel Flow

Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...

Depth Perception and Spatial Vision

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

Cable Subjected to Its Own Weight

Cable Subjected to Its Own Weight

Overhead power transmission lines rely on cables to carry electricity across large distances. To ensure the stability and functionality of these lines, it is crucial to understand the shape and tension experienced by the cables under the influence of their weight.
A generalized loading function is employed to analyze a cable subjected to its own weight. This function considers the force acting along the cable's arc length rather than its projected length, providing a more accurate...