To investigate whether the severity of symptoms visual fatigue might be associated with clinical measures and basic functions, such as accommodation, vergence, contrast sensitivity.In this study, 104 students were recruited (25 males, 79 females, Age 23.4 ± 2.5) for study. Those high myopia, strabismus, anisometropia, eye disease or history ophthalmological surgery excluded. The included subjects completed a questionnaire that assesses fatigue. Then, binocular accommodative facility,...

To investigate near-vision posture in Chinese myopic schoolchildren and compare during different tasks (i.e., playing video games, reading, writing).The study investigated 120 children (grades 1 through 6 aged to 13 years). An electromagnetic motion-tracking system was used for continuous measurements of the working distance head declination subjects while they were games or reading writing at a desk. The documents adjusted by grade level grades 2, 3 4, 5 6). For analysis, grouped two...

We demonstrate a novel type of ultrafast photodiode (PD), which offers high-power performance in the THz regime. The incorporation type-II GaAs <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</sub> Sb (p)/In xmlns:xlink="http://www.w3.org/1999/xlink">0.53</sub> Ga xmlns:xlink="http://www.w3.org/1999/xlink">0.47</sub> As (i) hybrid absorber InP-based uni-traveling carrier (UTC-PD) structure leads to an improvement responsivity, due narrowing...

We successfully demonstrate ultrafast uni-traveling carrier photodiodes (PD) with sub-terahertz bandwidth (∼170 GHz) and high-power performance under zero bias at 1.55-μm optical wavelength operation. By using a type-II (GaAs0.5Sb0.5/InP) absorption-collector interface inserting an n-type (1 × 1018 cm−3) charge layer in the collector, current blocking (Kirk) effect can be greatly minimized. A stack of undoped Al x In0.52Ga0.48−xAs layers different Aluminum mole fractions ( : 0.2 to 0.08)...

The thermal warpage problems in integrated circuit (IC) packaging exist both flip-chip and two-and-a-half dimensional circuits (2.5D IC) packages during manufacturing processes cycling service. This study proposes a simple easy-to-use strain gauge measurement associated with beam model theory to determine the thermally induced deformations warpages of packages. First, validation limitations are presented. Then, out-of-plane for well described by finite element method (FEM) simulation good...

Background: To assess the clinical effectiveness of orthoptic therapy in postoperative stabilisation and rehabilitation binocular function children with intermittent exotropia (IXT) after surgery. Methods: This was a prospective, parallel, randomised controlled trial. A total 136 IXT patients (aged from 7 to 17 years) who had been successfully corrected at 1 month surgery were enrolled this study, 117 (58 controls) completed 12-month follow-up visit. The primary outcome established as...

Background: Although much research has been conducted on the impact of strabismus quality life (QoL) adults, effect this condition teenagers not extensively studied. This study therefore aimed to assess vision-related QoL Chinese teenagers. Methods: The version 25-item National Eye Institute Visual Function Questionnaire (NEI-VFQ-25) was self-administered by 1,040 with and 1,002 individuals normal vision. All participants were from Han population. independent samples t -test used compare...

Digital refocusing for sparsely sampled light fields results in aliasing effect. For realistic quality, previous works performed anti-aliasing by applying time-consuming view interpolation a heuristic number of novel views. In this paper, we study problem first performing spectral analysis to give an analytical rule the number, which saves 34% views compared intuitional choice. Then propose fast algorithm using method is about 30x faster than VSRS-1D-Fast. Experimental show effectiveness our...

Purpose To study the longitudinal rehabilitation of binocular visual function in adolescent intermittent exotropia (IXT) after successful surgery and compare results with those a normal population. The role ocular alignment stability was also evaluated postoperatively. Methods In this prospective study, 30 adolescents IXT successfully corrected 1 month were followed for 12 months, children vision enrolled as controls. Stereopsis, fusional vergence amplitude, sensory fusion, accommodative...

To determine the influence of single-vision lenses (SVLs) and progressive addition (PALs) on near vision posture myopic children based their phoria.Sixty-two were assigned to wear SVLs followed by PALs. Eighteen esophoric (greater than +1), 18 orthophoric (-1 1) 26 exophoric (less -1) at near. Reading distance, head tilt ocular gaze angles measured using an electromagnetic system after adaptation each lens type.The type did not reading distance or angle (p>0.05 for both), but decreased...

Purpose Recently, Eyetronix Flicker Glass (EFG) has been introduced as a novel treatment for amblyopia. It alternatively deprives the visual input of each eye rapidly (e.g., 7 Hz). However, whether it is comparable with standard patching therapy unclear. In this randomized clinical trial, we evaluate efficacy an EFG amblyopia in children and compare to therapy. Methods We tested 31 (aged 4–13 years) They were assigned into one two groups treated 12 weeks. The first group was 1 h/day (Flicker...

Color performance on textiles is affected by many factors. In order to make the color presented more precisely, it necessary clarify relationship between fabric structure and dyeing effect, so as compensate displayed according different fabrics in matching. Pad of cotton with vat dyes was carried out, principal component analysis used analyze comprehensive properties fabrics. According factor weight, main factors affecting effect were obtained, a mathematical regression model values...

Purpose Atropine at a low concentration is considered safe and effective treatment to mitigate myopia progression. However, the potential unwanted side effects of administering atropine dose on visual functions other than best corrected acuity has not been investigated. In this study, we investigate short-term (12,16, 20 h) long-term (1, 2, 4 weeks) 0.01% (i.e., 0.1 mg/ml) contrast sensitivity (CS) in patients with myopia. Methods Thirty adults (23.33 ± 2.93 years old) between -1.00 -6.00...

Digital refocusing has a tradeoff between complexity and quality when using sparsely sampled light fields for lowstorage applications. In this paper, we propose fast physically correct algorithm to address issue in twofold way. First, view interpolation is adopted provide photorealistic at infocus-defocus hybrid boundaries. Regarding its conventional high complexity, devised line-scan method specifically refocusing, 1D kernel can be 30× faster than the benchmark View Synthesis Reference...

The increasing demand of unoccupied and unregulated bandwidth for wireless communication systems will inevitably lead to the extension operation frequencies toward lower THz frequency range. Since atmospheric transmission windows exist in range, it can be realized that carrier 300 GHz beyond used communications once technology high bitrate data is available. However, free-space path-loss attenuation due molecules atmosphere significantly reduce transmittable rate range.The main factor...

Optical characteristics of deep ultraviolet light-emitting diodes with the consideration spontaneous and piezoelectric polarizations are studied in this article APSYS (Advanced Physical Model Semiconductor Devices) simulation program. The amounts surface charges caused by different calculated compared. Moreover, band diagram, carrier distribution, radiative recombination current, light-current performance curves InAlGaN UV LED structures also discussed investigated. According to simulated...

Intermittent exotropia (IXT) is the most common type of in China. Surgery usually required to align eye deviation maintain or obtain better binocular visual function. However, there a high rate exodrift recurrence surgically treated patients. Orthoptic therapy sometimes recommended for IXT patients after surgery. lack high-quality randomized controlled trials prove that orthoptic could be an effective supplement surgical treatment The main purpose this study test clinical effectiveness...

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Objectives. This study aimed to compare changes in ocular status after 3D TV viewing under three modes of illumination and thereby identify optimal for viewing. Methods. The following measures were assessed: the accommodative response, microfluctuation, facility, relative accommodation, gradient convergence/accommodation (AC/A) ratio, phoria, fusional vergence. observers watched television 90 minutes through shutter glasses modes: A, complete darkness; B, back (50 lx); C, front (130 lx). was...