Results 161 to 170 of about 3,664,406 (246)

New design principles for visual acuity letter charts

, 1976
This paper introduces new principles for the design and use of letter charts for the measurement of visual acuity. It is advocated that the test task should be essentially the same at each size level on the chart.
Lovie-Kitchin, Jan E., Bailey, Ian L.
core  

(Ultra)high‐Pressure Metamorphism in Sedimentary Versus Basaltic Rocks: Insights From a Variscan Mélange in the South Carpathians

Journal of Metamorphic Geology, Volume 44, Issue 8, Page 585-610, September 2026.
ABSTRACT Reconstructing the pressure–temperature–time (P–T–t) evolution of (ultra)high‐pressure rocks is essential for constraining subduction and collisional dynamics. Subduction zones are often investigated using basic eclogites, whereas nonbasic high‐pressure rocks remain comparatively understudied, potentially hindering a comprehensive ...
Otavio S. G. Silva, Bruno V. Ribeiro, Gavril Săbău, Fabricio Caxito, Paulo A. de Paiva‐Silva, Pierre Lanari, George Luvizotto, Mahyra Tedeschi   +7 more
wiley   +1 more source

Quantitative evaluation of LED‐based optical autofocus module

Journal of Microscopy, Volume 303, Issue 3, Page 277-288, September 2026.
Abstract We report an improved version of the open‐source optical autofocus (OAF) module (openAF) for light microscopy, replacing the superluminescent diode (SLD) with a multimode‐optical fibre‐coupled LED as a more accessible AF module light source. We also present a method for independently quantifying AF system performance using 2D autocorrelation ...
S. Habte, S. Kumar, J. Lightley, E. Garcia, M. A. A. Neil, P. M. W. French   +5 more
wiley   +1 more source

A novel standardized test system to evaluate dynamic visual acuity post trifocal or monofocal intraocular lens implantation: a multicenter study

Eye, 2020
Xiao-Tong Ren, Yuexin Wang, Deng-Ting Wang, Baohua Wu, Lei Wu, Yanhui Xu, Jia-Rui Yang, Zhimin Chen, Xuemin Li   +8 more
semanticscholar   +1 more source

Digital Visual Acuity and Reading Performance with Positive and Negative Display Polarities After Bilateral Diffractive Multifocal Intraocular Lens Implantation: A Longitudinal Observational Study. [PDF]

Clin Ophthalmol
Somkijrungroj T, Surawatsatien N, Supawatjariyakul W, Wiriyabanditkul T, Pothikamjorn T.   +4 more
europepmc   +1 more source

Clinical Performance of an Isofocal Toric Intraocular Lens with Double C-Loop Haptics: A Multicenter Retrospective Study. [PDF]

Clin Ophthalmol
Daya S, Akahoshi T, Bosc C, Di Maria A, Espinosa Lagana M, Sasso N, Gaeta A.   +6 more
europepmc   +1 more source

Peripheral visual acuity and age

, 1989
We measured the peripheral visual acuity of a group of eleven older subjects (mean age 54.2 years) and a group of seventeen young subjects (mean age 22.1 years).
Bowman, Kenneth J., Brown, Brian, Collins, Michael J.   +2 more
core  

Improvement of uncorrected visual acuity and contrast sensitivity using Aurovue Vivid Continuous Focus Vision (CFV) lens in cataract patients at RSCM Kirana. [PDF]

BMC Ophthalmol
Sadikin IS, Zarwan J, Widyawati S, Martha F, Rhendy R, Ali S.   +5 more
europepmc   +1 more source

Real-World IOL Performance with Bilateral Plano Outcomes After Cataract Surgery: A Prospective, Comparative Study. [PDF]

Clin Ophthalmol
Coleman Iii WT, Martin CR, Cooley AW, Davidson CJ, DeNaro BB, Zaunbrecher N, Link T, Shakarchi FF, Shelby CL, LoBue SA.   +9 more
europepmc   +1 more source

Visual and accommodative outcomes after femtosecond LASIK with and without monovision in patients over 40 years. [PDF]

Int J Ophthalmol
Qi YY, Li Q, Wang GL, Wang HY, Li WT, Zhao SZ.   +5 more
europepmc   +1 more source