People with normal trichromatic color vision experience variegated hue percepts under dim illuminations where only rod photoreceptors mediate vision. Here, hue perceptions were determined for persons with congenital color vision deficiencies over a wide range of light levels, including very low light levels where rods alone mediate vision. Deuteranomalous trichromats, deuteranopes and protanope...

The term “color” can be used in two different ways. One way is to describe the subjective appearance of an object or a light source. The second way is to describe the physical characteristics of the stimulus. Throughout the last century attempts have been made to bridge these two domains with some, but not complete success. Perhaps a consequence of our inability to satisfactorily make this brid...

PURPOSE This study evaluated the color stability of four stains of a light-cured porcelain stain system between the light-cured and fired stages. MATERIALS AND METHODS Thirty-six ceramometal discs 20 mm in diameter and 2 mm in thickness were cast to provide the substrate on which Ceramco II porcelain was applied. The porcelain was polished to a uniform thickness of 2 mm, and the samples were ...

Abstract:Islamic painting is clearly influenced by the fundamental principles of Islamic thought. Not only this affects the meaning and content but also affects the form and structure of painting influenced the principles of Islamic thought. For example, the Quran as the main reference of Islamic thought expresses Islamic thought about color. We know that the color is the emission of the light ...

The relationship between canopy temperature and soil moisture is particularly important because of using canopy temperature as an indicator of crop water stress. A field experiment was conducted to calculate crop water stress index (CWSI) of two canola cultivars including RGS and Sarigol at College of Agriculture and Natural Resources of Darab, Shiraz University, Iran during 2013-2014 growing s...

THE Lancaster diplopia test (Lancaster, 1939) is simple and sensitive, shows topical cyclophoria easily, and is applicable to alternators with abnorinal retinal correspondence, so that in these respects it must be regarded as superior to the Hess test (Hess, 1916). The Lancaster method of recording, however, is less lucid, and attempts have been made, for example by Tulloch (1950) and Hugonnier...

Human eyes are unique. Unlike other primates whose pupils are masked by a dark sclera, the human eye highlights a dark pupil against a white sclera. Newborn infants look longer at schematic stimuli with three blobs arranged in a face-like configuration – but only if the blobs match the dark-on-light phenotype of the human eye. If a visual preference for faces with human-like eyes is innately sp...

An experiment was conducted to examine the hypothesis that the right hand system is superior in the processing of visual information. A manual aiming task utilizing four visual conditions was employed. In the full-vision (FV) condition subjects were afforded vision of both the hand and the target throughout the course of the movement. In the ambient-illumination-off (AO) condition, the room lig...

beds. From the Council, Mr. Wake went on, a handsome sum was already received, and now that the 60 beds had been added, a grant towards the cost of their maintenance would be applied for. The Sheffield scheme continues to grow, and there seems little doubt that eventually its adoption may become universal in the city. In this event sufficient money should be available, not merely to support the...