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
Single group
Prismatic low-powered lenses
DeviceParticipants perform biplanar X-ray before and after lens application
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.
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.
Radiographic modification of cervical spinal vertical alignment
Changes of cervical spinal vertical alignment are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in millimeters using the radiographic equipment proprietary software (EOS imaging). A minimum clinical significance value of 2 millimeters was estimated.
Radiographic modification of cervical lordosis
Changes of cervical lordosis 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).
Radiographic modification of inclination of C1
Changes of C1 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).
Radiographic modification of inclination of C2
Changes of C2 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).
Radiographic modification of global spinal vertical alignment
Changes of global spinal vertical alignment are measured between two subsequent radiographic biplanar scans in standing position, before and after lenses application on the same patient. Measurement is performed in millimeters using the radiographic equipment proprietary software (EOS imaging).
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