LEA Rectangles is an educational plaything, derived from Effron's rectangles, and used to assess vision for perception of sizes. It follows the principle which suggests that the total area of the rectangles is constant.
The LEA Mailbox is used to assess visual perception of line orientation and has two components: 1) information for the hand movements in the parietal lobe and 2) picture perception in the infer-temporal lobe.
(paddles) developed by Dr HyvÃ¤rinen. An easy to use tool for measuring grating acuities of infants, pre-verbal children and people with multi handicaps. An infant detects the presence of parallel lines of decreasing widths. The infant is likely to look at the striped paddle rather than the gray paddle.
Developed by Lea HyvÃ¤rinen, MD to improve early evaluation of vision communication. Some visually impaired children cannot see expressions and do not recognize people's faces.
Sturdy canvas "Vision Associates" tote bag.
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