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Doctoral Degrees (Optometry)

Permanent URI for this collectionhttps://hdl.handle.net/10413/6740

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Browsing Doctoral Degrees (Optometry) by Subject "Eye health."

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    Development of an assessment instrument to measure disability related distress in primary school learners with vision impairment due to uncorrected refractive error in rural areas of KwaZulu-Natal Province, South Africa.
    (2017) Chan, Ving Fai.; Naidoo, Kovin Shunmugam.; Singer, Susanne Katharina.
    With the increasing global emphasis on improving eye health in children, numerous efforts are being implemented to meet the eye care needs of the children. There is no instrument which can be used to measure the impact of the Disability Related Distress (DRD) on children with vision impairment (VI) due to uncorrected refractive error (URE). Aim The aim of the study was to develop an assessment instrument to measure DRD in Grade 1 to Grade 5 learners with VI due to URE in a rural and semi-rural setting. Methods This mixed-method study was conducted in 4 primary schools in Pinetown, KwaZulu Natal, Durban in 3 phases. Phase 1 involved twelve focus group discussions using semi-structured interviews to identify themes that formed the DRD items in the Instrument. A topic was qualified as an item if at least two participants made substantive comments on the topic in a single focus group and the topic was discussed by at least one child in two different groups. In Phase 2, we consulted ten experts to construct an instrument for pre-testing by considering relevance, relative importance, upsetting issues and wording of the items. Issues that had a mean score < 2 for relevance or importance were excluded. In Phase 3, we pre-tested the instrument to identify missing or redundant issues. An item was included in the final instrument if the mean score of relevance was > 1.5; prevalence ratio >30% or prevalence of scores 3 or 4 >50%; range of rate of occurrence was > 2 points; no significant concerns expressed by Primary Subjects, Secondary Subjects and Tertiary Subjects, and compliance of less than 5% of the responses to the item in the debriefing session suggested that the issues were not related to VI due to URE. Results In Phase 1, thirteen children with normal vision and 63 children with VI due to URE consented to participate in the focus group discussions. Eleven themes were generated from the focus group discussions and included as items in the draft provisional list. In Phase 2, one item was excluded and the experts pointed out the need to give explanations to the children. The items included were from the domains of Loss of Self Confidence (n=3), Loss of self-worth (n=3), Loss of interconnection/ interaction with community (n=2), Suspicion, humiliation and fight (n=1) and Discrimination (n=2). In Phase 3, pre-testing was conducted on 120 children (Normal vision, NV: Mild vision impairment, MVI: Severe vision impairment, SVI: 60:30:30). The rate of occurrence of the items showed an increasing trend, from NV to MVI and SVI. The average time needed for completing the questionnaire showed an increasing trend, from NV to MVI and SVI. All eleven items in the provisional list fulfilled the retention parameters. Conclusion The developed instrument is valid, appropriate and culturally sensitive to the rural population. Its administration is resource-friendly and efficient with straightforward analysis and interpretation of data. This makes it easy to communicate the finding to a wide range of stakeholders and decision makers.
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    Reducing vision impairment in children through health system assessment and strengthening approach in Papua New Guinea.
    (2018) Wabulembo, Geoffrey.; Naidoo, Kovin Shunmugam.
    ABSTRACT A strong and efficient integrated health system is able to contribute to the reduction of vision impairment among children by ensuring preventive measures are implemented and timely access to care is done in case of morbidity. Children in Papua New Guinea presenting late for congenital cataract surgery, incurring avoidable eye injuries, living with uncorrected refractive error and some presenting with advanced retinoblastoma were of concern to the researcher. The overall aim of the study was to assess how the current health system in Papua New Guinea is addressing child eye health using Port Moresby General Hospital and Goroka hospital as case studies. It is envisaged that a health strengthening approach benefits children’s eye health in the community. Methods Both quantitative and qualitative methods were employed. Retrospective medical records review of children seen at the eye clinic in Port Moresby and Goroka Hospitals from January 2015 to December 2017 was conducted. In the qualitative method service providers and caregivers were interviewed to obtain their perspectives regarding performance of the health system. Results At Port Moresby General Hospital trauma, conjunctivitis and corneal ulcers accounted for 21.6%, 18.9% and 9% respectively of all the diagnoses among children. Trauma was in the ratio of 1:1 (p= 0.264) male to female. And 7.3% (n=51) of the children were blind (according to the WHO definition). Among the blind children optic nerve disorders accounted for 20.5 %( n=14) followed by both un-operated cataracts and uncorrected refractive error each at 13.2% (n=9). Retinoblastoma presented at mean age 5.869 (SD4.5) and 6.02(SD 2.4) years for girls and boys respectively. The main causes of ocular morbidity observed at Goroka Hospital were corneal ulcers (24.9%), uveitis (9.3%) and foreign bodies (9.2%). Service provider interviews revealed lack of policy on child eye health, shortage of health personnel and limited community eye health services. But among care givers lack of eye health information in the community, concerns about long waiting time at the hospitals and inadequate explanation about conditions affecting the children featured prominently. Conclusion Findings show a higher percentage of blind children compared to similar hospital based studies elsewhere. To achieve universal eye health coverage, raising awareness about child eye health needs among leaders in health is urgent. Successes registered in the past in Papua New Guinea in other child health efforts like immunisation suggest that a consistent and focused health system strengthening approach with greater integration may contribute to reduction of vision impairment among children. A proposed child eye health strategy based on the findings from this study is included in this thesis.