Autism spectrum disorders (ASD) have been associated with sensory hypersensitivity. A recent study reported visual acuity (VA) in ASD in the region reported for birds of prey. The validity of the results was subsequently doubted. This study examined VA in 34 individuals with ASD, 16 with schizophrenia (SCH), and 26 typically developing (TYP).…

Dr. Orfield's highly readable guide on vision development presents ground-breaking solutions to common learning problems and is supported by substantial data. This holistic common sense--that most people do not know--is not just about vision but also how vision is interrelated with learning. It teaches how to care for a child's vision as well as…

The authors present 10 experiments that challenge some central assumptions of the dominant theories of visual search. Their results reveal that the complexity (or redundancy) of nontarget items is a crucial but overlooked determinant of search efficiency. The authors offer a new theoretical outline that emphasizes the importance of nontarget…

This paper reports the major findings and interprets the results of longitudinal and cross-sectional exPeriments concerning the development of visual accommodation in infants 1 to 3 months of age. The stimulus was a high-contrast, random checkerboard which was presented at three different distances from the infants (25, 50 or 100 cm). The physical…

This study explores the reason why very young infants are unable to respond differentially to faces and the cause for developmental changes in infant face perception by age 3 months. Linear systems analysis (LSA) and the contrast sensitivity function (CSF) were used to estimate the facial pattern information available to 1- and 3-month-old…

This annotated bibliography contains both opinion and research articles dealing with various aspects of vision. The entries are divided into four categories: visual acuity, visual perception, perceptual motor development, and eye movements. Within each category are entries presenting controversial and contradictory viewpoints and evidence enabling…

Most vision screening today concerns itself only with the physical phase of vision, consequently the relationship of vision to learning becomes slighted. Rather, vision should be discussed as it operates when learning takes place through seeing. Vision as it operates for learning is a very complex process--it has physical (acuity), physiological…

Outlines a course in photography for use in secondary school art classes to develop perceptual awareness and extend range of vision. (DS)

In this study, two similar depth perception experiments were conducted to investigate 3-month-old infants' perception of changes in depth while they were being moved. In the first, the subjects, 18 infants (80 to 105 days old) were lowered face down towards the textured floor of a 3-sided enclosure (visual crib). Three experimental conditions were…

Perceptual-motor functioning is a cyclic process involving: (1) organizing incoming sensory stimuli with past or stored perceptual information; (2) making motor (internal) decisions based on the combination of sensory (present) and perceptual (past) information; (3) executing the actual movement (observable act) itself; and (4) evaluating the act…

Visual fixations were recorded in newborn, 4-, and 8-week-old human infants as they scanned displays that varied in contour length, size, number, and a new metric, CVAL (based on Contour Variability, Amount and Location). One of the findings was that both contour length and CVAL separately accounted for approximatel1 95 of looking-duration…