Characterizing glare effects associated with diffractive optics in presbyopia-correcting intraocular lenses.

Purpose: To objectively quantify glare of intraocular lenses (IOLs) using a diffractive principle to extend the visual range and to identify models with increased susceptibility to inducing glare.

Setting: David J Apple Laboratory, Heidelberg, Germany.

Design: Laboratory investigation.

Changes in straylight after cataract surgery.

Purpose: To investigate straylight in the immediate postoperative period after cataract surgery.

Setting: Amphia Hospital, Breda, the Netherlands.

Design: Prospective, comparative, single-arm, single-center, single-surgeon study.

Light scattering from a diffractive-refractive intraocular lens: a goniometer-based approach for individual zone assessment.

We proposed and tested a method to measure light scattering from the diffractive lens profile in an echelle element featuring 9 zones. Measurements were performed using a goniometer-based setup up to 7.5°.

Diurnal Variation in Straylight in Patients With Fuchs Endothelial Corneal Dystrophy and Controls.

Purpose: The goal of this study was to investigate diurnal changes in intraocular straylight in relation to other corneal parameters and subjective complaints in patients with Fuchs endothelial dystrophy and healthy controls.

Methods: This is a prospective study conducted in 2 tertiary care hospitals in Germany and the Netherlands. Patients with Fuchs endothelial dystrophy (n = 71) and healthy controls (n = 34) were included.

Straylight due to intraocular lens opacification in a patient with asteroid hyalosis.

Purpose: To report a rare case of intraocular lens (IOL) calcification in the presence of asteroid hyalosis with in-vivo measurements of straylight before and after treatment.

Observations: A patient with asteroid hyalosis presented with complaints of disability glare due to calcifications on the posterior surface of the IOL. Straylight, measured with the C-Quant, was 8.

The Effect of a Spectral Filter on Visual Quality in Patients with an Extended-Depth-Of-Focus Intraocular Lens.

Purpose: Wavelength dependence of diffractive intraocular lenses (IOLs) was recognized in vitro but not yet assessed in vivo. By examining pseudophakic patients who had extended-depth-of-focus diffractive implants, this spectral effect on their vision was measured clinically and the lens was tested in vitro.

Design: Cross-sectional study with laboratory investigation.

Quality factor based correction for SD-OCT measurements in cataract patients.

Purpose: To correct peripapillary retinal nerve fibre layer (pRNFL) measurements performed with spectral domain optical coherence tomography (SD-OCT) for low image quality factor (QF) in patients with cataract, using measurements before and after cataract surgery.

Methods: SD-OCT (Topcon 3DOCT-2000) volume scans of the optic disc of 13 cataract patients were used. A set of three reflective filters with optical density ranging from 0.

Assessment of straylight and the modulation transfer function of intraocular lenses with centrally localized opacification associated with the intraocular injection of gas.

Purpose: To assess the optical quality of intraocular lenses (IOLs) explanted because of opacification after the intraocular injection of gas.

Setting: David J. Apple Laboratory, Heidelberg, Germany.

Association between Contrast Sensitivity and Reading with Macular Pathology.

Significance: Comparison between the role of spatial and temporal contrast sensitivities in the association with reading may provide insight into how visual tasks (such as reading) are related to primary optical or neural (or both) effects. More insight into primary visual factors influencing reading is important for understanding reading problems.

Purpose: The aim of this study was to gain insight into the association between optical and neural components of contrast sensitivity (CS), operationalized as spatial CS (optical and neural) or temporal CS (solely neural), and reading speed in a clinical sample of participants with macular pathologies.

Intraocular light scatter, reflections, fluorescence and absorption: what we see in the slit lamp.

Purpose: Much knowledge has been collected over the past 20 years about light scattering in the eye- in particular in the eye lens- and its visual effect, called straylight. It is the purpose of this review to discuss how these insights can be applied to understanding the slit lamp image.

Results: The slit lamp image mainly results from back scattering, whereas the effects on vision result mainly from forward scatter.

The significance of changes in pupil size during straylight measurement and with varying environmental illuminance.

Purpose: In this work, we investigated the pupillary conditions during straylight measurement, and the potential effect this might have on the measured straylight.

Methods: Five young (26-29-years-old) and 15 older (50-68-years-old) individuals participated in this study. First, the pupil diameter of both eyes was measured at three room illuminances.

Light scattering levels from intraocular lenses extracted from donor eyes.

Purpose: To assess light scatter levels of intraocular lenses (IOLs) extracted from donor eyes to understand straylight elevation documented earlier in pseudophakic population studies and identify potential sources of light scattering in IOLs.

Setting: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands.

Design: Experimental study.

Changes in Intraocular Straylight and Visual Acuity with Age in Cataracts of Different Morphologies.

Purpose: To investigate the significance of difference in straylight of cataract eyes with different morphologies, as a function of age and visual acuity.

Methods: A literature review to collect relevant papers on straylight, age, and visual acuity of three common cataract morphologies leads to including five eligible papers for the analysis. The effect of morphology was incorporated to categorize straylight dependency on the two variables.

Validation of a spectral light scattering method to differentiate large from small particles in intraocular lenses.

A psychophysical approach has been designed to measure straylight from intraocular lenses (IOLs) . This approach uses a clinical straylight meter (C-Quant) and an observer's eye as optical detector. Based on this, we introduced a method for study of straylight-wavelength dependency for IOLs.

Effects of Corneal Scars and Their Treatment With Rigid Contact Lenses on Quality of Vision.

Objectives: To study the effects of corneal scars and the treatment of these scars with rigid gas-permeable (RGP) contact lenses on quality of vision including straylight. Visual effects were related to scar characteristics such as size and grade.

Methods: Straylight and best-corrected visual acuity were measured in 23 patients with corneal scars during and after RGP contact lens wear.

Straylight from glistenings in intraocular lenses: In vitro study.

Purpose: To assess light scattering from intraocular lenses (IOLs) with different numbers of laboratory-induced glistenings and create a model for predicting glistening effects on straylight.

Setting: Rotterdam Ophthalmic Institute, Rotterdam, the Netherlands.

Design: Experimental study.

The (lack of) relation between straylight and visual acuity. Two domains of the point-spread-function.

Purpose: The effect of cataract and other media opacities on functional vision is typically assessed clinically using visual acuity. In both clinical and basic research, straylight (the functional result of light scattering in the eye) is commonly measured. The purpose of the present study was to determine the link between these two measures: is visual acuity in cataract and other media opacities related to straylight?

Methods: Interdependence between acuity and straylight is addressed from three different points of view: (1) Methodological: can acuity differences affect the measurement value of straylight, and vice versa? (2) Basic optics: does the optical process of light scattering in the human eye affect both straylight and visual acuity? (3) Statistical: how strongly are acuity and straylight correlated in the practice of important clinical conditions? Experimental and theoretical aspects will be considered, with a focus on normal ageing and cataract formation.

Straylight as an Indicator for Cataract Extraction in Patients with Retinal Dystrophy.

Purpose: Straylight reduces retinal sensitivity, which is particularly relevant in conditions with retinal dysfunction, such as retinitis pigmentosa (RP). Retinitis pigmentosa is associated with posterior subcapsular cataract (PSC), a cataract type that is known to cause severe disability glare (i.e.

Ocular Straylight with Different Multifocal Contact Lenses.

Purpose: Multifocal contact lenses have been growing in popularity as a modality to correct presbyopic eyes, although visual side effects such as disability glare have been reported. The objective of this study was to investigate the effect of multifocal contact lenses on disability glare by means of ocular straylight.

Methods: A prospective randomized, comparative study was performed that included 16 subjects free of ocular pathology.

Associations Between Spatial and Temporal Contrast Sensitivity and Reading.

Purpose: To gain insight into the association between optical and neural components of contrast sensitivity (CS), operationalized as spatial CS (optical and neural) or temporal CS (solely neural), and reading speed in a clinical sample of healthy adults of various ages. Furthermore, precision and agreement of the two methods were assessed.

Methods: The Mars test and the temporal CS implementation of the C-Quant device were used to measure spatial CS and temporal CS, respectively.

Comparison of ocular straylight after implantation of multifocal intraocular lenses.

Unlabelled: A comprehensive review of the effect of multifocal intraocular lens (IOL) designs on postoperative ocular straylight was performed. Studies reporting straylight values obtained with the natural pupil using the C-Quant device after uneventful multifocal IOL implantation were included. The IOLs were categorized based on their material characteristics; that is, hydrophobicity and presence of colored chromophores.

Increased Straylight in Patients With Keratoconjunctivitis Sicca.

Purpose: (1) To qualify complaints of quality of vision in patients with (severe) keratoconjunctivitis sicca by examining straylight values and (2) to check for an effect of scleral lens wear on straylight.

Methods: Straylight was measured in 16 patients with severe keratoconjunctivitis sicca using the Oculus C-Quant. In 9 of these patients, scleral lenses were used, and straylight was measured with and without scleral lenses.