Refractive error accuracy and user perceptions of a smartphone home-based tester
African Vision and Eye HealthBackground: Uncorrected refractive error accounts for nearly half of the global burden of vision impairment. The EyeQue personal vision tracker (EPVT) was created as a convenient smartphone refractometer to be used at home and order spectacles online ...
Lungile M. Buthelezi +6 more
doaj +1 more source
Awareness and Attitude toward Refractive Error Correction Methods: A Population Based Study in Mashhad [PDF]
Patient Safety and Quality Improvement Journal, 2013 Objectives: This study was designed to determine the level of awareness and attitude toward refractive correction methods in a randomly selected population in Mashhad, Iran.
Saber Moghaddam Ranjbar AK +2 more
doaj
Creating materials with a desired refraction coefficient: numerical experiments [PDF]
arXiv, 2010 A recipe for creating materials with a desired refraction coefficient is implemented numerically. The following assumptions are used: \bee \zeta_m=h(x_m)/a^\kappa,\quad d=O(a^{(2-\kappa)/3}),\quad M=O(1/a^{2-\kappa}),\quad \kappa\in(0,1), \eee where $\zeta_m$ and $x_m$ are the boundary impedance and center of the $m$-th ball, respectively, $h(x)\in C(D)
arxiv
A NEW FRAME FOR HOLDING SPHERICAL AND CYLINDRICAL LENSES DURING THE DETERMINATION AND CORRECTION OF ERRORS OF REFRACTION. [PDF]
, 1881 JamesE. Adams
openalex +1 more source
Synthetic Active Liquid Crystals Powered by Acoustic Waves
Advanced Materials, EarlyView.A fully synthetic active liquid crystal, energized by an acoustic field, is presented. This system exhibits active nematic behavior, tunable topological defect dynamics, and persistent hydrodynamic vortices at high activity levels. The material maintains stable properties while enabling precise activity control in a wide range.
Andrey Sokolov +3 more
wiley +1 more source
Influence on extracted complex refractive index from phase inaccuracy of reflection-type THz-time-domain spectroscopy [PDF]
arXivReflection-type terahertz (THz) time-domain spectroscopy (THz-TDS) enables the measurement of optical properties of opaque samples in the THz frequency range, e.g., carrier density and mobility. In this study, we examine the influence of phase inaccuracy on the extracted complex refractive index from reflection-type THz-TDS.
arxiv
Advanced Materials, EarlyView.Laser micropatterning is presented as a promising technology in the search for autonomous dew water harvesting materials. Laser‐grooved metallic surfaces achieve simultaneously high infrared emissivity and superhydrophilicity, which gives them self‐cooling properties under atmospheric radiative deficit and the ability to condense water in an efficient ...
Pablo Pou‐Álvarez +7 more
wiley +1 more source
ON AN IMPROVED OPTOMETER FOR ESTIMATING THE DEGREE OF ASTIGMATISM AND OTHER ERRORS OF REFRACTION. [PDF]
, 1886 John Tweedy
openalex +1 more source
Advanced Materials, EarlyView.Wearable sensors, empowered by AI and smart materials, revolutionize healthcare by enabling intelligent disease diagnosis, personalized therapy, and seamless health monitoring without disrupting daily life. This review explores cutting‐edge advancements in smart materials and AI‐driven technologies that empower wearable sensors for diagnostics and ...
Shuwen Chen +14 more
wiley +1 more source
On an Error in Brunnow's Formulae for Differential Refraction in Distance and Position-Angle [PDF]
, 1889 Warren H. Finlay
openalex +1 more source