Hearing and vision screening for preschool children using mobile technology, South Africa

Objective:To implement and evaluate a community-based hearing and vision screening programme for preschool children in the Western Cape, South Africa, supported by mobile health technology (mHealth) and delivered by community health workers (CHWs).Methods:We trained four CHWs to provide dual sensory screening in preschool centres of Khayelitsha and Mitchells Plain during September 2017­December 2018. CHWs screened children aged 4­7 years using mHealth software applications on smartphones. We used logistic regression analysis to evaluate the association between screening results and age, sex and test duration, and, for hearing, excessive background noise levels.Results:CHWs screened 94.4% (8023/10 362) of eligible children at 271 centres at a cost of 5.63 United States dollars per child. The number of children who failed an initial hearing and visual test was 435 (5.4%) and 170 (2.1%), respectively. Hearing test failure was associated with longer test times (odds ratio, OR: 1.022; 95% confidence interval, CI: 1.021­1.024) and excessive background noise levels at 1 kilohertz (kHz) (e.g. OR for left ear: 1.688; 95% CI: 1.198­2.377). Visual screening failure was associated with longer test duration (OR: 1.003; 95% CI: 1.002­1.005) and younger age (OR: 0.629; 95% CI: 0.520­0.761). Of the total screened, 111 (1.4%) children were diagnosed with a hearing and/or visual impairment.Conclusion:Health-supported CHW-delivered hearing and vision screening in preschool centres provided a low-cost, acceptable and accessible service, contributing to lower referral numbers to resource-constrained public health institutions

Identifying hearning loss by means of iridology

Isolated reports of hearing loss presenting as markings on the iris exist; but to date the effectiveness of iridology to identify hearing loss has not been investigated. This study therefore aimed to determine the efficacy of iridological analysis in the identification of moderate to profound sensorineural hearing loss in adolescents. A controlled trial was conducted with an iridologist; blind to the actual hearing status of participants; analyzing the irises of participants with and without hearing loss. Fifty hearing impaired and fifty normal hearing subjects; between the ages of 15 and 19 years; controlled for gender; participated in the study. An experienced iridologist analyzed the randomised set of participants' irises. A 70correct identification of hearing status was obtained by iridological analyses with a false negative rate of 41compared to a 19false positive rate. The respective sensitivity and specificity rates therefore came to 59and 81. Iridological analysis of hearing status indicated a statistically significant relationship to actual hearing status (P 0.05). Although statistically significant sensitivity and specificity rates for identifying hearing loss by iridology were not comparable to those of traditional audiological screening procedures