THE VISION & LEARNING CENTER
Vision Problems in Children with Sensory Processing Disorder
Sensory Processing Disorder (SPD) affects a wide variety of people. Individuals with SPD and other different diagnoses or labels may have sensory issues such as sound sensitivity, difficulty screening out background noise, or visual sensitivity to fluorescent lights. SPD can occur in conjunction with autism, dyslexia, attention-deficit/hyperactivity
disorder, speech delay, and learning problems (Temple Grandin, PhD, Sensory Focus Magazine; Spring 2013).
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Vision Problems and PressVision
Eye Movement Disorders
There are three basic types of eye movements: fixations, saccades, and pursuits. Fixation is the act of maintaining visual attention on one point in space. Saccades are voluntary eye movements used to scan the environment. It is the type of eye movement used when reading. Pursuits are eye movements used to track a moving target. It is the type of eye movement used when following traffic.
Eye movement disorders include basic deficiencies in fixations, saccades or pursuits.
Fixation tremors can occur in a variety of conditions, including Parkinsonism. Fixation may be difficult for a child with ADHD. Nystagmus is a condition in which the eyes oscillate back and forth. In accuracy in saccades, usually drifts, overshooting or undershooting, can occur in isolation, in the absence of other vision problems. This is one reason why it is crucial that every patient with reading difficulty have a thorough assessment of saccade function. Traditional eye examinations do little if anything to evaluate saccades, resulting in a false sense of security that everything is fine. Deficiencies in pursuits are more likely to occur in broad neurological or motor control problems such as cerebral palsy.
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