Ataxia is presented by various etiologies, including acquired, genetic and degenerative disorders. Although hereditary ataxia suspected when typical symptom of with concurrent identified, it sometimes difficult to diagnose without test. Clinically, next generation sequencing technology has been developed widely used for diagnosis disease. Hereby, we experienced cases genetically confirmed <i...

Human vision is quantified through the use of standardized clinical vision measurements. These measurements typically include visual acuity (near and far), contrast sensitivity, color vision, stereopsis (a.k.a. stereo acuity), and visual field periphery. Simulator visual system performance is specified in terms such as brightness, contrast, color depth, color gamut, gamma, resolution, and field...

A clinical trial was undertaken to determine whether a commercially available lens opacity meter (LM701), which measures backward scattered light from the lens, provides reliable clinical information about the effect of lens opacities on visual acuity. At the 0.001 level of probability we found a significant relationship between the lens opacity meter reading and both the Snellen acuity and pat...

Here, we systematically explore the size and spacing requirements for identifying a letter among other letters. We measure acuity for flanked and unflanked letters, centrally and peripherally, in normals and amblyopes. We find that acuity, overlap masking, and crowding each demand a minimum size or spacing for readable text. Just measuring flanked and unflanked acuity is enough for our proposed...

Auditory disorders in patients with normal peripheral hearing acuity have long been recognized. Many of these patients report considerable difficulty listening in less than optimal environments, such as in the presence of reverberation or with unfavorable signal-to-noise ratio. Karlin (1942) stated that “ . . . conventional auditory acuity tests have little predictive value of auditory behavior...

BACKGROUND Racial disparities are frequently reported in emergency department (ED) care. OBJECTIVES To examine racial differences in triage scores of pediatric ED patients. We hypothesized that racial differences existed but could be explained after adjusting for sociodemographic and clinical factors. METHODS We examined all visits to two urban, pediatric EDs between August 2009 and March 2...

The aim of this study was to analyze and compare corneal biomechanics in patients with bilateral keratoconus (KCN) with unilateral Vogt's striae. In this prospective contralateral study, visual acuity, refraction, and corneal biomechanical parameters were evaluated in patients with bilateral KCN with unilateral Vogt's striae using the Ocular Response Analyzer (ORA) (Reichert Inc., Buffalo, NY) ...

Our impressive sensitivity to vernier offsets as compared to resolution acuity has long inspired vision researchers to study the phenomena in great detail. In this study we use the test-pedestal framework to compare resolution and vernier acuity. In these experiments the test stimulus is the same for both tasks, only the pedestals differ. When thresholds are expressed in common units of test st...