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.
Methods: A scatterometer with laser sources of 488 nm and 633 nm was used to directly measure the forward-scattered light of IOLs. These sources illuminated balanced salt solution-immersed IOLs within a cylindrical wet cell. The wet cell was placed at the center of rotation of a goniometer arm. On the end of the arm was a detector that measured the amount of laser light scattered from the IOL as a function of incident-beam angle. The measurements provided a profile of the scatter distribution for regions outside the directly transmitted beam. Forward and back light scatter was measured in new and artificially aged IOLs.
Results: Forward light scatter was increased in artificially aged IOLs compared with that in new unaged IOLs. The artificially aged IOLs developed sub-wavelength-diameter water nanoglistenings in the bulk material just below the surface. The measured scatter profiles were consistent with these subsurface droplets, suggesting Rayleigh-type scatter in the aged IOLs. The amount of light scatter from nanoglistenings does not appear to be sufficient to impair vision. Although the severely aged IOLs showed increased scatter, the level of increase was within 1 standard deviation of what is found in the normal population.
Conclusion: A technique was developed enabling quantification of forward-scattered and back-scattered light from IOLs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcrs.2012.10.049 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Depolarized Forward Light Scattering for Subnanometer Precision in Biomolecular Layer Analysis on Gold Nanorods.
J Phys Chem Lett
January 2025
Department of Physics, Chalmers University of Technology, 412 96 Göteborg, Sweden.
Functional gold nanoparticles have emerged as a cornerstone in targeted drug delivery, imaging, and biosensing. Their stability, distribution, and overall performance in biological systems are largely determined by their interactions with molecules in biological fluids as well as the biomolecular layers they acquire in complex environments. However, real-time tracking of how biomolecules attach to colloidal nanoparticles, a critical aspect for optimizing nanoparticle function, has proven to be experimentally challenging.
View Article and Find Full Text PDFThe effects of xylazine on locomotion and motor behaviour in a planarian model.
Behav Pharmacol
January 2025
Department of Psychology, Massachusetts College of Liberal Arts, Massachusetts, USA.
In recent years, the recreational use of xylazine has increased dramatically in the USA. Although xylazine has been used as an anesthetic in veterinary medicine for decades, little is known about its behavioral effects. We took advantage of the planarian's innate negative phototaxis, the reliable movement from the light side to the dark side of a Petri dish, to explore the organism's suitability as an animal model for investigating the preclinical pharmacology of xylazine.
View Article and Find Full Text PDFBioengineering strategies targeting angiogenesis: Innovative solutions for osteonecrosis of the femoral head.
J Tissue Eng
January 2025
Department of Biomedical Engineering, The Chinese University of Hong Kong, Hong Kong SAR, China.
Osteonecrosis of the femoral head (ONFH) is a prevalent orthopedic disorder characterized primarily by compromised blood supply. This vascular deficit results in cell apoptosis, trabecular bone loss, and structural collapse of the femoral head at late stage, significantly impairing joint function. While MRI is a highly effective tool for diagnosing ONFH in its early stages, challenges remain due to the limited availability and high cost of MRI, as well as the absence of routine MRI screening in asymptomatic patients.
View Article and Find Full Text PDFA Critical Reappraisal of Haloperidol for Delirium Management in the Intensive Care Unit: Perspective from Psychiatry.
J Clin Med
January 2025
Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, CA 94305, USA.
Delirium is a complex neuropsychiatric syndrome with multifactorial pathophysiology, encompassing a wide range of neuropsychiatric symptoms, and its management remains a significant challenge in critical care. Although often managed with antipsychotics, like haloperidol, current research has predominantly focused on dopamine dysregulation as the primary driver of delirium, overlooking its broader neuroanatomical and neurochemical underpinnings. This has led to a majority of research focusing on haloperidol as a treatment for intensive care unit (ICU) delirium.
View Article and Find Full Text PDFHigh-Temperature Optoelectronic Transport Behavior of n-TiO Nanoball-Stick/p-Lightly Boron-Doped Diamond Heterojunction.
Materials (Basel)
January 2025
Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, China.
The n-TiO nanoballs-sticks (TiO NBSs) were successfully deposited on p-lightly boron-doped diamond (LBDD) substrates by the hydrothermal method. The temperature-dependent optoelectronic properties and carrier transport behavior of the n-TiO NBS/p-LBDD heterojunction were investigated. The photoluminescence (PL) of the heterojunction detected four distinct emission peaks at 402 nm, 410 nm, 429 nm, and 456 nm that have the potential to be applied in white-green light-emitting devices.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!