The color vision has been described as one to be very sensitive to the intake of several chemicals. The present research reviews the published literature that is concerned with color vision impairment due to alcohol. Most of this research considers people under long-term effects of alcohol. However, there is little information about temporary effects of alcohol on color vision. A group of ten volunteers aged 18-40 was studied. During the study levels of alcohol in the body were tested with a standard breathalyzer while color vision were studied using Farnsworth Munsell 100 Hue Color Vision Tests. Keywords: Col
After a few weeks a newborn baby can recognize high contrasts in colors like black and white. They reach full color vision at the age of circa six months. Matching colors is the next milestone. Most children can do it at the age of two. Good color vision is one of the factors which indicate proper development of a child. Presented research shows the correlation between color vision and visual activity. The color vision of a group of children aged 3-8 was examined with saturated Farnsworth D-15. Fransworth test was performed twice - in a standard version and in a magnetic version. The time of completing standard and magnetic tests was measured. Furthermore, parents of subjects answered questions checking the children’s visual activity in 1 - 10 scale. Parents stated whether the child willingly watched books, colored coloring books, put puzzles or liked to play with blocks etc. The Fransworth D-15 test designed for color vision testing can be used to test younger children from the age of 3 years. These are preliminary studies which may be a useful tool for further, more accurate examination on a larger group of subjects.
Disorder of color vision in humans is the inability to perceive differences between some or all of the colors that are normally perceived by others. Color blindness is usually a birth defect, a genetically determined. For this reason it is much more common in men than women. This paper presents the results of the test FarnsworthD-15 and Lanthony D-15 on a group of volunteers, both adults and children. The study was conducted to compare the results of both tests.
Detection of vision defects of a child without professional knowledge is not easy. Very often, the parents of a small child does not know that their child sees incorrect. Also the youngster, not knowing any other way of seeing, does not know that it is not the best. While the vision of a small child is not yet fully formed, it is worth checking them very early. Defects detected early gives opportunity for the correction of anomalies, which might give the effect of the normal development of vision. According to the indications, the American Optometric Association (AOA) control eye examination should be performed between the ages of 6 months to 3 years, before going to school and then every two years. Members of SPIE Student Chapter, in cooperation with the Visual Optics Group working on the Department of Optics and Photonics (Faculty of Fundamental Problems, Wroclaw University of Science and Technology) for 6 years offer selected kindergartens of Wroclaw participation in project “Screening vision tests in pre-school children”. Depending on the number of involved members of the student chapter and willing to cooperate students of Ophthalmology and Optometry, vision screening test was carried out in up to eight kindergartens every year. The basic purpose of screening vision test is to detect visual defects to start the correction so early in life as possible, while increasing the efficiency of the child's visual potential. The surrounding community is in fact more than enough examples of late diagnose vision problems, which resulted in lack of opportunity or treatment failure
The study presents measurement and numerical analysis of time variability of the eye pupil geometry and its
position, as well as their correlations with blood pulsation. The image of the eye pupil was recorded by use of the fast
CCD camera with 200 fps rates. Blood pulsation was synchronously recorded by use of pulse transducer with the
sampling frequency of 200 Hz. Each single image from a sequence was numerically processed. Contour of the eye pupil
was approximated, and its selected geometrical parameters as well as center positions were calculated. Spectral and
coherence analysis of time variability of calculated pupil parameters and blood pulsation were determined.
Paper presents method of numerical analysis of time variability the eye pupil geometry by use of the first and the second moments of irregular pupil form. Sequences of the pupil shape variations were recorded by use of high-speed CCD camera, with recording speed 250fps and next analyzed on a group of 11 patients. The shape of the pupil for each frame from the sequence was characterized numerically by use of second moments of inertia and orientation of its principal axes. Additionally the area and coordinates of center of gravity of the pupil were calculated. Kinetics of the pupil area, its moment of inertia and principal axes inclination angle were analyzed for each sequence. Results of calculations based on the real shape of the pupil were compared with the elliptic approximation of the pupil form. Calculations show high similarity of results for elliptic approximation of the pupil form and the real form approach. However, more exact analysis show a clear differences in the variability of pupil parameters.