Comparison of a Smartphone Based Self Refraction Tool With Conventional Refraction Error Estimation Methods

Not Applicable

• Conditions: Refractive Errors; Self-Examination
• Interventions: Diagnostic Test: Smartphone; Diagnostic Test: Autorefractor; Diagnostic Test: Individual

• Registration Number: NCT03419351
• Lead Sponsor: University Hospital Tuebingen

Brief Summary

Self evaluating tools based on smartphone devices are public available on the market for each person. The tools are used to estimate the existing refractive error for each eye of a patient. Hereafter, e.g. ordering glasses via internet could be the next step for this persons.

The daily routine within an eye hospital shows, that estimation of the refractive error is a difficult and time consuming procedure.

The study compares the results of the measured refractive error using a smartphone based tool with the results of conventional measurement methods.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-11-20
• Study First Submitted: 2017-12-06
• Status Verified: 2018-01
• Primary Completion: 2018-01-31
• Study First Submitted QC: 2018-01-31
• Last Update Submitted: 2018-01-31
• Study First Posted: 2018-02-01
• Last Update Posted: 2018-02-01
• Study Completion: 2018-03-31

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

• existing refractive error
• using glasses or contac lenses

Exclusion Criteria

• opacities (visus limitating) of cornea, lens or vitreous
• known ocular pathologies except refractive error
• epilepsia
• irregular corneal topography

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Main group	Individual	Main study group including all individuals that underwent the study procedures
Main group	Smartphone	Main study group including all individuals that underwent the study procedures
Main group	Autorefractor	Main study group including all individuals that underwent the study procedures

Primary Outcome Measures

Name	Time	Method
Refractive Error	6 month	Comparison of refractive error measurements between methods

Secondary Outcome Measures

Name	Time	Method
Time consumption	6 month	Comparison of needed time to reach self-test refraction error results and conservative-test results.
Personal evaluation of measuring accuracy (Questionnaire)	6 month	Would persons be willing to order glasses by using only self-test-results?
Visual acuity	6 month	Visual acuity of persons using based on different methods.

Trial Locations

Locations (1)

University Eye Hospital; 🇩🇪 Tuebingen, BW, Germany