Measuring Cyclotorsion on Scanning Laser Ophthalmoscopy (SLO)-Fundus Photographs

Not Applicable

Completed

• Conditions: Trochlear Nerve Diseases

• Registration Number: NCT02631369
• Lead Sponsor: University of Zurich

Brief Summary

Pre-Study: Evaluation of the inter- and intrarater reliability of the integrated algorithm by Heidelberg Spectralis for measuring cyclotorsion on SLO-fundus fotographs, and assessment of the influence of measuring with or without eye tracker.

Study: Comparison of cyclotorsion measurements in patients with forth nerve palsy and in healthy controls on SLO-fundus fotographs using the integrated algorithm by Heidelberg Spectralis

Detailed Description

Not available

Study Timeline

• Study Start: 2015-12
• Study First Submitted: 2015-12-09
• Study First Submitted QC: 2015-12-11
• Study First Posted: 2015-12-16
• Primary Completion: 2017-12
• Study Completion: 2017-12
• Status Verified: 2018-06
• Last Update Submitted: 2018-06-11
• Last Update Posted: 2018-06-13

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 82

Inclusion Criteria

• ≥ 18 years old
• best corrected visual acuity ≥ 0.8

Exclusion Criteria

• strabismus except for forth nerve palsy
• previous strabismus surgery
• monocle
• best corrected visual acuity ≤ 0.6
• hyperopia or myopia > 6dpt

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
study: excyclotorsion in degrees on SLO-fundus fotographs	12 months	study: comparison of cyclotorsion measurements in healthy controls compared to patients with forth nerve palsy; excyclotorsion in degrees (based on the line crossing the fovea and the center of the optic nerve head) as provided by the integrated algorithm by Heidelberg Spectralis
pre-study: reliability of repeated measurements of excyclotorsion in degrees on SLO-fundus fotographs	3 months	pre-study: inter- and intrarater reliability of the device with or without eye tracker; excyclotorsion in degrees (based on the line crossing the fovea and the center of the optic nerve head) as provided by the integrated algorithm by Heidelberg Spectralis

Secondary Outcome Measures

Name	Time	Method
study: excyclotorsion in degrees on tangent screen, double maddox and fundus photographs	12 months	validation of the cyclotorsion measurement with the Heidelberg Spectralis device against tangent screen \[degrees\], double maddox \[degrees\] and fundus photographs \[degrees\]

Trial Locations

Locations (1)

University Hospital Zurich, Dept of Ophthalmology; 🇨🇭 Zurich, ZH, Switzerland