This study aims to investigate the short-term modifications in head and neck positioning by usage of low-powered prismatic lenses in patients with Postural Deficiency Syndrome (PDS). A matched pair observation study was designed. Evaluation is carried out using low dose biplanar radiography before treatment and 15 minutes after lenses application.
Two or more cardinal signs of Postural Deficiency Syndrome
Clinical presentation of asymmetrical stance and head extension and rotation
Presence of typical directional pseudoscotoma described in this syndrome
Vision under 8/10, strabismus or nistagmus;
Previous eye or vestibular surgery;
Known disease affecting the central nervous system or inner ear;
Medication with known interference with balance and posture and