Feasibility of Visual Field Screening Apps

Completed

• Conditions: Visual Field Defect, Peripheral

• Registration Number: NCT05169983
• Lead Sponsor: University Hospital Southampton NHS Foundation Trust

Brief Summary

A visual field (VF) is a measurement of how wide an area our eyes can see when fixed onto a point. Visual field testing is one of the ways of assessing how much vision there is in each eye and how much vision might have been lost over time. Defects in the visual field are seen in diseases such as glaucoma, which is one of the leading causes of blindness. VF tests should be performed regularly during outpatient appointments to help monitor these conditions before they progress. Monitoring individuals with VF defects presents a large strain on eye services at University Hospitals Southampton (UHS).

Recently an Apple iPad-based application called 'VisualFields easy' has been developed that could be used at home to test visual fields, opening up the possibility of remote monitoring. This is especially significant since the onset of the COVID-19 pandemic which has left outpatient clinics across the UK with large patient backlogs. However, it's not understood yet to what level of accuracy this iPad test can be performed by untrained people and whether the results of this test are medically reliable.

This study will measure if there's a correlation between iPad-based VF measurements and the standard clinic-based measurements taken by professionals. The potential of this app to be used at home will also be assessed with a usability questionnaire. These measurements will be taken during routine eye and neurology outpatient clinics at UHS. Home-based VF testing could allow those who weren't able to access eye services during the pandemic greater follow-up and monitoring. Through providing regular, up-to-date information on a patient's condition and progress, VF tests at home may improve outcomes. The investigators also foresee the benefits of this app on NHS clinical services, with the potential of reduced outpatient appointments and waiting times thus easing pressure on the NHS.

Detailed Description

Not available

Study Timeline

• Study Start: 2021-09-10
• Study First Submitted: 2021-09-20
• Study First Submitted QC: 2021-12-09
• Study First Posted: 2021-12-27
• Primary Completion: 2022-08-19
• Study Completion: 2022-08-19
• Status Verified: 2022-10
• Last Update Submitted: 2022-10-26
• Last Update Posted: 2022-10-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 45

Inclusion Criteria

• Participant aged 17 or older
• Familiar with and able to use tablet technology

Exclusion Criteria

• Patient not willing to participate in the study and give written informed consent
• Patients with learning difficulties that preclude reliable assessment of visual fields

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Accuracy of the visualFields easy App	Through study completion, an average of 1 year	To determine the statistical strength and / or presence or absence of correlation between the iPad-based visual field assessment procedure in comparison to clinic-based visual field assessment.

Secondary Outcome Measures

Name	Time	Method
Feasibility of home-based visual field assessment	Through study completion, an average of 1 year	To explore through a quantitative questionnaire, the possible feasibility and utility of home-based visual field assessment

Trial Locations

Locations (1)

Eye Unit, University Hospitals Southampton NHS Foundation Trust; 🇬🇧 Southampton, United Kingdom