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

Lisbon Academic Medical Center - Centro Académico de Medicina de Lisboa20 enrolled

Overview

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.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Postural Neck Pain Postural Imbalance Postural Disorders

Interventions

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

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.

Outcomes

Primary Outcomes

Radiographic modification of pelvic tilt angle

Changes in pelvic tilt angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.

Time frame: From enrollment to second radiographic evaluation on day 1

Radiographic modification of C0 inclination

Changes in C0 inclination angle are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in degrees using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 3 degrees was estimated.