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Red reflex examination for early detection of pediatric cataract using a novel red-reflex screening device
Hongzhe Li1,2,3, Zexin Chen1,2,3, Li Wan1,2,3
1National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China.
Insights
Early detection of pediatric cataracts is crucial. The CatScreener device, operated by non-experts, showed high accuracy and consistency, comparable to traditional methods, aiding in preventing vision loss.
Area of Science:
- Ophthalmology
- Medical Devices
- Pediatric Health
Background:
- Early detection of pediatric cataracts is vital to prevent irreversible vision impairment.
- Effective screening methods for pediatric cataracts are limited in many regions.
- This study assesses the CatScreener, a handheld red-reflex device, for non-expert use.
Purpose of the Study:
- To evaluate the diagnostic performance of the CatScreener in pediatric cataract screening.
- To compare the CatScreener's accuracy with standard slit-lamp examinations.
- To assess the usability and learning curve of the CatScreener for non-expert examiners.
Main Methods:
- 250 eyes from children (≤8 years) underwent CatScreener screening and slit-lamp examination.
- Images were interpreted by medical students and junior ophthalmologists.
- Diagnostic outcomes were compared to a reference standard; CUSUM analysis assessed proficiency.
Main Results:
- CatScreener diagnostic accuracy was non-inferior to slit-lamp examination (p > 0.05).
- High sensitivity (84.9%-87.1%) and specificity (89.2%-91.0%) were observed.
- Excellent agreement with slit-lamp (Kappa=0.856-0.952) and good inter-examiner consistency (Kappa=0.792-0.920) were found.
Conclusions:
- The CatScreener is an effective, user-friendly tool for early pediatric cataract detection.
- It demonstrates high diagnostic accuracy and strong agreement with conventional methods.
- Consistent performance across examiners with varied experience highlights its utility.
Background:
Early detection of pediatric cataracts is essential to prevent irreversible visual impairment; however, effective screening remains limited in many settings. This study evaluated the diagnostic performance of the CatScreener, a self-designed handheld red-reflex screening device, when operated by non-expert examiners.
Methods:
A total of 250 eyes from 250 infants and young children (≤8 years) underwent CatScreener screening and slit-lamp examination. Images were independently interpreted by two medical students and two junior ophthalmologists. Diagnostic outcomes were compared with an expert-defined reference standard. Cumulative summation (CUSUM) analysis was used to assess the learning curve for operational proficiency.
Results:
Diagnostic accuracy did not differ significantly between CatScreener screening and slit-lamp examination across all examiners (all p > 0.05). The CatScreener demonstrated high sensitivity (84.9%-87.1%) and specificity (89.2%-91.0%), with excellent agreement with slit-lamp examination (Kappa = 0.856-0.952) and good inter-examiner consistency (Kappa = 0.792-0.920). Sensitivity and specificity remained stable across chronological operation stages and age-stratified subgroups. CUSUM analysis indicated that approximately 50 cases were required to achieve operational proficiency.
Conclusions:
The CatScreener is an effective and user-friendly tool for the early detection of pediatric cataracts, demonstrating high diagnostic accuracy, strong agreement with conventional examination methods, and consistent performance across examiners with varying levels of clinical experience.
