Background and aims: Color blindness is a disease that remains undiagnosed in some cases. Thediagnosis of the disease during schooling is necessary to take the required measures for the future lifeof adolescents. Therefore, the aim of this study was to determine the prevalence of color blindnessamong the students of secondary schools in Shahrekord.Methods: In this descri...

PURPOSE To develop and assess new color vision tests to be used in evaluating faulty color recognition. METHODS We developed new color vision tests to evaluate faulty color recognition. The two types of color vision tests, designed to assess faulty color recognition in color vision deficiencies, are based on principles that are different from those of the conventional color vision tests. In t...

Day vision and night vision are two separate modes of visual perception and the visual system shifts from one mode to the other based on ambient light levels. Each mode is primarily mediated by one of two photoreceptor classes in the retina, i.e., cones and rods. In day vision, visual perception is primarily cone-mediated and perceptions are chromatic. In other words, color vision is present in...

Color is an extremely important component of the information that we gather with our eyes. Most of us use color so automatically that we fail to appreciate how important it is in our daily activities. It serves as a nonlinguistic code that gives us instant information about the world around us. From observing color, for example, we can find the bee sting on an infant's arm even before it begins...

This report chronicles several experiments the Civil Aerospace Medical Institute has conducted to assess the effects that advances in technology have had on automated flight service station air traffic control specialists color identification tasks and the ensuing revisions to the color vision standard and verification testing.

This report describes the status of color use in current air traffic control (ATC) displays. It represents the first step in our effort to reexamine the color vision standards for air traffic controllers. The current job-related color vision tests used by the FAA are based on an analysis of ATC tasks conducted in the 1980s. Over the past decade, many color displays have been introduced while th...

This paper critically examines color relationalism and color relativism, two theories of color that are allegedly supported by variation in normal human color vision. We mostly discuss color relationalism, defended at length in Jonathan Cohen's The Red and the Real, and argue that the theory has insuperable problems.

26.1. Physics of the Eye • Explain the image formation by the eye. • Explain why peripheral images lack detail and color. • Define refractive indices. • Analyze the accommodation of the eye for distant and near vision. 26.2. Vision Correction • Identify and discuss common vision defects. • Explain nearsightedness and farsightedness corrections. • Explain laser vision correction. 26.3. Color and...