accommodative spasm

failure of the eye muscles involved in accommodation to relax after focusing on near objects, resulting in transient myopia. Affecting one or both eyes, it is usually caused by an injury to the parasympathetic nervous system and can occur after head injury. The primary symptom is visual blurring at all distances, in many cases occurring over a period of months or even years.

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Psychology term of the day

November 15th 2024

spinal root

the junction of a spinal nerve and the spinal cord. Near the cord, each spinal nerve divides into a dorsal root carrying sensory fibers and a ventral root carrying motor fibers, as stated by the Bell–Magendie law.