The most commonly used chart for testing eye acuity is the Snellen Chart, developed more than 100 years ago. A description is given of the way this chart works, its uses, and its limitations. (JD)

The article describes a vision screening program in Manitoba to identify high-risk children. Organizational strategies, instrumentation, and results of a study of the effectiveness of the screening process with 732 children are detailed. (Author)

Discusses student learning difficulties linked to visual disorders such as dyslexia and amblyopia, problems associated with current school vision-screening procedures, and recommendations to improve preschool and in-school vision-screening practices with an emphasis on early, regular, and comprehensive eye examinations. (PKP)

The article reports on a Michigan program for the screening of preschool children for visual defects. The development of the modified Snellen E for testing young children is described; other test procedures are outlined. Charts illustrate the growth of the program over a 12-year period. (PHR)

Children with intellectual disabilities have an increased risk of visual impairment, caused by both ocular and cerebral abnormalities, but this risk has not been quantified. The same applies to preterm children and children with cerebral palsy with a normal intelligence. Many cases probably go unidentified, because participation of these children…

Comparison of a variety of vision screening methods used with preschool children led to modification of the standard Snellen E test called the Blackbird Vision Screening System. An instructional story using an "E-bird" was developed to teach children the various possible positions of the E. The visual confusion caused by the chart was…

This article describes a device, the Visual Hand Display, used by pediatric ophthalmologists at the Children's Low Vision Center (Boston) to evaluate a child's postoperative visual functioning. The device consists of different sized black stripes on white circles and a face. (DB)

The article gives a select overview of the purpose, process, and procedures which are involved in neonatal vision screening. Significant responses and reactions worth noting are outlined so an evaluator might have an indication of what to look for in using such a tool. (Author)

A summary of evidence regarding the prevalence of visual abnormality among deaf students, appropriate planning for and implementation of vision assessment services, and the importance of follow-up services for visually impaired deaf individuals is presented. The results of seven assessment studies based in educational programs for the deaf are…

Techniques used by the Special Visual Assessment Clinic for the Handicapped at the University of California-Berkeley School of Optometry are designed to serve handicapped children and adults generally considered "difficult to assess." This article describes the clinic's assessment goals, clientele, and methods for assessing visual ability and…

This article describes a visual assessment procedure (VAP) which evaluates capacity, attention, and processing (CAP) of infants and preschool children with visual impairments. The two-level battery considers, first, visual capacity and basic visual attention and, second, visual perceptual and cognitive abilities. A theoretical analysis of the…

An approach to functional vision evaluations clarifies the types of data collection and suggests protocols for three broad categories of visually handicapped children: "normal" school-age students, "normal" preschoolers, and multiply handicapped pupils. Visually impaired infants are classified with multiply handicapped pupils…

A screening program for vision problems and Usher's Syndrome (a common cause of deaf-blindness) among 210 hearing-impaired students found 44 percent had significant vision problems and 1 percent had Usher's Syndrome. The program involved an interagency network of school, health care, and support personnel and utilized a dilated ophathalmological…

In order to assess vision in Alzheimer's disease, gerontologists must use tests that make minimal cognitive demands on the subject. Using such tests revealed a pattern of deficits in color discrimination, stereoacuity, contrast sensitivity, and backward masking. Impaired vision predicts deficient performance on numerous tests of cognition. (JPS)

Eye diseases of the aged include diabetic retinopathy, senile cataracts, senile macular degeneration, and glaucoma. Environmental modifications such as better levels of illumination and reduction of glare can enhance an individual's ability to function. Programs to screen and treat visual problems in elderly persons are called for. (Author/JDD)