Erhardt Developmental Products®
Videos and other Materials about Child Development and Children with Disabilities

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Normal Visual Development: Birth to 6 Months (1986)
30 minutes. V13P: $90. V13R: $45.

CLICK ON THIS THUMBNAIL IMAGE TO VIEW A FULL SIZE VIDEO CAPTURE. This video presents a comprehensive range of visual behaviors, grouped into self-contained Developmental Sequence Clusters, which demonstrate how skills at each level lead to those at the next. Major topics include: reflexive patterns (pupillary reactions, doll's eye responses, and eyelid reflexes), and voluntary movements of localization (visual approach), fixation (visual grasp), ocular pursuit (visual manipulation), and gaze shift (visual release).

Administration of the Erhardt Developmental Vision Assessment (EDVA©)(1989)
90 minutes. V14P: $100. V14R: $50.
This video demonstrates administrative procedures for using the EDVA© to assess visual-motor function in a school-aged child with cerebral palsy, illustrating appropriate positioning, materials, verbal instructions, and presentation techniques.

Normal and Atypical Visual Function (1990)
35 minutes. V16P: $95. V16R: $47.50.
CLICK ON THIS THUMBNAIL IMAGE TO VIEW FULL SIZE VIDEO CAPTURES.

1. Components of Visual-Motor Function in a Normal Young Adult
This video presents the eye movement patterns of a normal young adult, following the format of the EDVA-S (Erhardt Developmental Vision Assessment short screening form).
2. Atypical Visual-Motor Function in Persons with Developmental Disabilities (V16). 35 minutes
This video presents examples of 12 children and adults with cerebral palsy, multiple handicaps, and developmental disabilities, who were evaluated with the EDVA©. Their eye movement patterns, which show missing reflexive and voluntary motor components below the mature 6-month level, are related to their physical, medical, and optical diagnoses.

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