Influence of head posture on the visual acuity of children with nystagmus.

PURPOSE Evaluate the relationship between the postural alignment of the head and possible interference in the view of children. METHODS We evaluated 11 children between 2 and 7 years of age of both sexes, with the visually impaired, who had nystagmus and head lock position. The test Lea Grating Acuity Test® was used to collect measurements of visual acuity. This applied on two occasions: with and without postural alignment of the head. For reliability of the postural alignment of the head, the slopes were measured by Fisiologic® software. RESULTS The children had a poorer performance after physiological postural alignment. This poor performance is possible due to loss of position lock nystagmus to gain postural alignment, said to be ideal. Postural compensations were observed, and sharply increased eyestrain. CONCLUSION The pursuit of traditional postural alignment affect the visual response of children with visual impairments.