Cognitive Vision Tests

LEA Mailbox Game

#254700 The LEA Mailbox Game (#254700) was designed for assessment of visual recognition of line directions. Some children and adults with brain lesions may be able to turn a ‘letter’ (the plastic card simulating a letter) in correct orientation when the task is to drop it through the slot, yet are unable to tell the… Read more »

LEA Rectangles Game

#254600 The LEA Rectangles Game contains two groups of rectangles with different shades of grey. The total surface area of each rectangle is the same. This set of rectangles is a modification of Efron’s rectangles and was designed to allow observations on a child’s ability to see differences in size. To make the test situation… Read more »

Heidi Expressions Test Game

#254500 The Heidi Expressions Test Game (#254500) has been developed to improve early evaluation of vision for communication. Among the vision impaired children there are some who cannot see expressions and/or do not recognize people by their faces. These children may have nearly normal results in routine vision tests (i.e. large visual field and normal… Read more »

Heidi Fixation Targets

#253000 & #253100 The smallest fixation stick (#253000) in the test materials has a picture of a smiling face 5 cm (2 in) in diameter. This kind of happily smiling face was chosen based on the studies by Robert Fantz. Normally developing infants respond to it, follow it with combined eye and head movements at the… Read more »

Introduction to Testing Cognitive Vision

Causes of Changes in Processing of Visual InformationDisorders of the Eyes and Anterior Visual PathwaysLateral Geniculate NucleusProcessing of Visual Information in the BrainEarly Processing of Visual InformationProcessing of Visual Information in Ventral and Dorsal StreamThe Profile of Visual FunctioningRefraction and SpectaclesFactors Affecting the Test SituationsVisual SphereVisual FieldVisual AttentionFollowing Movements and SaccadesIllumination and PositionVideo RecordingsSummary Disorders… Read more »

Low Contrast Face Test for Communication Distances

#253500 At the age of 12 weeks at the latest, infants respond to a friendly smile with a happy “social smile”. Their mirror neuron system makes it possible to “mirror” facial expressions if the baby can see facial features clearly enough to copy them. Therefore, if an infant does not respond to smiling faces, eyes… Read more »

LEA 3-D Puzzle

#251600, #251650 (magnetic) Among the picture tests the LEA SYMBOLS® test is the only test with optotypes calibrated with Landolt C and so abstract in their forms that they are close to letters in recognizability if the abstract names “circle”, “square”, “pentagon”, are used. Yet, if we use the names of pictures of concrete objects,… Read more »