The lens equivalent refractive index (RI) is commonly used in calculations of crystalline lens power. However, accurate determination of the equivalent RI is challenging due to the need of multiple measurements with different ocular biometry devices. A custom extended-depth Spectral Domain-OCT system was utilized to provide measurements of corneal and lens surface curvatures and all intraocular distances required for determination of the lens equivalent RI. Ocular biometry and refraction were input into a computational model eye from which the equivalent RI was calculated. Results derived from human subjects of a wide age range show a decrease in RI with age and demonstrate the capability of measurements of the equivalent RI with extended-depth OCT.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6377882 | PMC |
| http://dx.doi.org/10.1364/BOE.10.000411 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Visual, Refractive, Functional, and Patient Satisfaction Outcomes After Implantation of a New Extended Depth-of-Focus Intraocular Lens.
Clin Ophthalmol
December 2024
Department of Ophthalmology, Donostia University Hospital, Donostia-San Sebastián, Spain.
Purpose: To describe the visual, refractive, functional, and patient satisfaction outcomes of the Bi-Flex POB-MA 877PEY (Elon, Medicontur Medical Engineering Ltd. Zsámbék, Hungary) extended depth-of-focus intraocular lens (EDoF IOL).
Patients And Methods: This was a prospective longitudinal descriptive study.
Exploring the Link: A Systematic Review and Meta-Analysis on the Prevalence and Association Between Refractive Errors and Intermittent Exotropia.
Health Sci Rep
December 2024
Department of Surgery College of Medicine, University of Baghdad Baghdad Iraq.
Background And Aims: Refractive errors and intermittent exotropia are prevalent conditions in pediatric populations, impacting visual development and quality of life. Despite the co-occurrence of conditions such as myopia, hypermetropia, and astigmatism with strabismus, comprehensive analyses of their coexistence are limited. This study aims to investigate the prevalence and characteristics of refractive error among children with intermittent exotropia and find the correlation between the angle of deviation for far and near with factors like mean spherical equivalent and age.
View Article and Find Full Text PDFQuality of vision with monofocal intraocular lens after cataract surgery: Comprehensive evaluation and graphical illustration.
Eur J Ophthalmol
December 2024
Ophthalmology Unit, Centro Hospitalar Universitário de Coimbra (CHUC), Unidade Local de Saúde (ULS) de Coimbra, Coimbra, Portugal.
Article Synopsis
- The study aimed to assess the quality of vision (QV) in patients undergoing bilateral cataract surgery with a specific type of intraocular lens (IOL) in Portugal, and it proposes a graphical representation for clarity.
- A total of 26 patients, averaging 68 years old, were evaluated three months post-surgery on various visual performance metrics, including uncorrected and corrected visual acuity, reading speed, contrast sensitivity, and more.
- Results indicated high patient satisfaction correlated with multiple factors, and the study successfully created a radar graph to visualize the comprehensive data on visual performance.
Effect of astigmatism and spherical equivalent correction on contrast sensitivity.
Int J Ophthalmol
December 2024
Department of Optometry, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran 1616913111, Iran.
Aim: To investigate the effect of astigmatism and spherical equivalent (SE) correction on contrast sensitivity (CS).
Methods: In this cross-sectional study, 103 visually normal subjects aged 18 to 36y with bilateral regular astigmatism in range of 1.00 diopter cylinder (DC) to 4.
Hyperopia shift in the long term after cataract surgery: a case report.
BMC Ophthalmol
December 2024
Shanghai Eye Diseases Prevention &Treatment Center, Shanghai Eye Hospital, School of Medicine, Tongji University, Shanghai, China.
Background: Long-term hyperopia shift is a rare complication following cataract surgery, presenting significant clinical challenges in analysis and management.
Case Presentation: A 52-year-old female with a history of high myopia and laser-assisted in-situ keratomileusis (LASIK) surgery presented with decreased vision in her left eye at the very fifth year after cataract surgery. The spherical equivalent in her left eye had increased to + 6.
Want 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!