Enhanced Housing Photoscreeners 2WIN and GoCheckKids Compared in Burma and Alaska

Completed

• Conditions: Amblyopia; Anisometropia
• Interventions: Device: photoscreen

• Registration Number: NCT04068129
• Lead Sponsor: Alaska Blind Child Discovery

Brief Summary

"Adaptica" (Padova, Italy) designed a fixed-distance, dark portable tube with power and remote control for the "2WIN: photoscreener. GoChecksKids designed a flash-concentrating case for the iPhone 7+ to more quickly achieve two-axis photoscreen. These devices were compared to confirmatory exams in children and young adults in a remote Burma clinic and in an Alaskan pediatric ophthalmology practice.

Detailed Description

Photoscreening with follow up confirmatory exams for referred and passed interpretations were offered to children and young adults at a remote clinic in the Karen State of eastern Burma (Myanmar). The clinic had intermittent 220 Volt power generator, but no internet or cell phone coverage.

Consecutive patients in a "WiFi-equipped" pediatric ophthalmology practice in Anchorage, Alaska had photoscreening before confirmatory examination.

Each patient had photoscreening with the "2WIN" photoscreener installed in the "Kaleidos" housing. In Anchorage, the devise was controled by the wireless tablet computer. In Burma, however, despite a "WiFi router" not connected to internet, the tablet computer would not connect to the 2WIN and therefore the "Kaleidos" read-trap door was opened so the 2WIN could be activated and controlled manually. The" 2WIN" stored results on an "micro-SD" memory card which was eventually downloaded to computer.

Each patient also had photoscreening with GoCheckKids (GCK) on an "iPhone 7 Plus" using the enhanced, flash-concentrating cell-phone case. In Anchorage, in addition to on-site smart-phone interpretation, images were uploaded to the central reading center for secondary interpretation. In Burma, all images were retained on the smart phone and eventually uploaded for GoCheckKids central secondary analysis after return to urban internet availability. In Burma, a portable, light-wieght tent was used to provide a dim screening environment with less distraction.

Confirmatory exams were performed consistent with 2003 and 2013 American Association for Pediatric Ophthalmology and Strabismus (AAPOS) uniform guidelines. Cycloplegic refractions were performed 20-40 minutes after cyclopentolate 1% instillation. Visual acuity was checked with patched, surround "HOTV" at 3 meters threshold with at least 3 of 4 optotypes correct. Validation was performed with conventional 2 x 2 screen-exam matrix, and also with Alaska Blind Child Discovery (ABCD) 3 x 3 matrix including inconclusive results (no instrument interpretation or unable to gain a reading) with inconclusive interpretations considered a referral.

Study Timeline

• Study Start: 2019-02-11
• Primary Completion: 2019-04-12
• Study Completion: 2019-04-15
• Status Verified: 2019-08
• Study First Submitted: 2019-08-21
• Study First Submitted QC: 2019-08-22
• Study First Posted: 2019-08-28
• Last Update Submitted: 2020-10-14
• Last Update Posted: 2020-10-19

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 162

Inclusion Criteria

• at least one eye

Exclusion Criteria

• bilateral enucleation

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Alaska	photoscreen	Patients in pediatric ophthalmology clinic
Burma	photoscreen	Patients from remote Burma clinic

Primary Outcome Measures

Name	Time	Method
Amblyopia Rick Factor prevalence	February 15, 2019 through April 16, 2019	AAPOS 2003 and 2013 defined ARFs

Secondary Outcome Measures

Name	Time	Method
Refractive Error	February 15, 2019 through April 16, 2019	Glasses prescription

Trial Locations

Locations (1)

Alaska Children's EYE & Strabismus; 🇺🇸 Anchorage, Alaska, United States