Visual impairment is differentiated from blindness in degree and educational needs. (CB)

The use of an optometric consultant to evaluate a student's educational handicap relating to vision is discussed. (CD)

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)

A physician examines five noneducational factors (body chemistry, motor function, vision, allergy and infection, and social influences) which affect the nature of handicapped children. (CL)

It has recently been shown that perceived motion, in the absence of any appropriate retinal motion, is a sufficient stimulus to generate smooth pursuit eye motions. However, three experiments show that perceived motion is not necessary for pursuit, but that retinal motion always governs pursuit. (BB)

Rod-isolation techniques show that light-adapted human rods detect flicker frequencies as high as 28 hertz, and that the function relating rod critical flicker frequency to stimulus intensity contains two distinct branches. (MLH)

Describes the burgeoning field of behavioral optometry, which specializes in promoting the use of both vision systems (focal and ambient) so they can work together to produce optimum visual efficiency, and in concentrating much of its work on developing or remediating the ambient vision system. Includes a simple test to determine need for a…

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)

Confronted by complex tasks, economic restrictions, and community concerns, administrators need clear visions to guide their schools and staffs toward effective learning. To develop a personal vision, principals must first understand their strengths and weaknesses, know what they value most, and decide what they want to accomplish as…

Discusses Fermat's Principle: Light always travels the path that requires the least amount of time. Includes discussion of refraction, angle of incidence, and angle of reflection. (MKR)

Discusses neural activity and stimulation crucial in fetal brain development and the formation of the mind. Focuses on activity-dependent remodeling related to development of the visual system and retinal activity. (MCO)