Radiographic Head and Neck Positional Changes in Response to Usage of Low-powered Prismatic Lenses

Radiographic Head and Neck Positional Changes in Response to Oculomotor Muscles Tonic Modification Using Low-powered Prismatic Lenses

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.

Inclusion Criteria:

Presentation of diagnostic criteria for Postural Deficiency Syndrome comprising of

• 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

Exclusion Criteria:

• 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
• treatment for postural and movement disorders in the previous year.