Research output per year
Research output per year
- 49 results
Search results
-
2024
Depression, anxiety, stress symptoms and their determinants among secondary students with vision impairment in rural Northwestern China during the COVID-19 pandemic
Li, D., Chan, V. F., Wang, H., Zhang, H., Virgili, G., Whitestone, N., Xiao, B., Singh, M. K., She, X., Mackenzie, G., Boswell, M., Mavi, S., Rozelle, S. & Congdon, N., 24 Jan 2024, In: Frontiers in Public Health. 11, 8 p., 1282826.Research output: Contribution to journal › Article › peer-review
Open AccessFile48 Downloads (Pure) -
Does an integrated school eye health delivery model perform better than a vertical model in a real-world setting?: a non-randomised interventional comparative implementation study in Zanzibar
Chan, V. F., Yard, E., Mashayo, E., Mulewa, D., Drake, L., Price-Sanchez, C. & Omar, F., Jan 2024, In: British Journal of Ophthalmology. 108, 1, p. 152-158. 7 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)44 Downloads (Pure) -
Does electronic data collection perform better than paper-based data collection in health research fieldwork? A participatory action research in Zanzibar
Othman, O. J., Mashayo, E., Jones, J., Shah, K., Graham, C., Yong, A. C., Graham, R., Omar, F. & Chan, V. F., 03 Jun 2024, In: BMJ Public Health. 2, 1, 6 p., e000749.Research output: Contribution to journal › Article › peer-review
Open AccessFile23 Downloads (Pure) -
Impact of vision impairment and ocular morbidity and their treatment on quality of life in children: a systematic review
Li, D., Chan, V. F., Virgili, G., Mavi, S., Pundir, S., Singh, M. K., She, X., Piyasena, P., Clarke, M., Whitestone, N., Patnaik, J. L., Xiao, B., Cherwek, D. H., Negash, H., O'Connor, S., Prakalapakorn, S. G., Huang, H., Wang, H., Boswell, M. & Congdon, N., Feb 2024, In: Ophthalmology. 131, 2, p. 188-207 20 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile75 Downloads (Pure) -
Needs and views on eye health and women’s empowerment and theory of change map: implication on the development of a women-targeted eyecare programme for older Zanzibari craftswomen
Omar, F., McCluskey, K., Mashayo, E., Yong, A. C., Mulewa, D., Graham, C., Price-Sanchez, C., Othman, O., Graham, R. & Chan, V. F., 23 Feb 2024, In: BMJ Open Ophthalmology. 9, 1, 9 p., e001292.Research output: Contribution to journal › Article › peer-review
Open AccessFile33 Downloads (Pure) -
Patients’ acceptance of glaucoma therapy in sub-Saharan Africa
Olawoye, O., Sarimiye, T., Washaya, J., Gessesse, G. W., Balo, K., Agre, J., Macheka, B., Kizor-Akaraiwe, N., Pons, J., Ashaye, A., Garba, F., Chitedze, R., Ibanga, A., Mahdi, A., Ogunro, A., Budengeri, P., Ajibode, H. A., Tamrat, L., Onakoya, A. & Okeke, S. & 9 others, , 15 Aug 2024, (Early online date) In: Journal of Glaucoma.Research output: Contribution to journal › Article › peer-review
Open AccessFile6 Downloads (Pure) -
The effect on income of providing near vision correction to workers in Bangladesh: The THRIVE (Tradespeople and Hand-workers Rural Initiative for a Vision-enhanced Economy) randomized controlled trial
Sehrin, F., Jin, L., Naher, K., Das, N. C., Chan, V. F., Li, D. F., Bergson, S., Gudwin, E., Clarke, M., Stephan, T. & Congdon, N., 03 Apr 2024, In: PLOS ONE. 19, 4, 13 p., e0296115.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)37 Downloads (Pure) -
2023
Caretakers’ stated willingness to pay for children’s spectacles in cross river state, Nigeria and its implication for a cross-subsidisation scheme: a cross-sectional study
Ebri, A. E., O'Neill, C., Azubuike, K., Congdon, N., Graham, C., Lohfeld, L. & Chan, V. F., 05 Jun 2023, In: BMC Public Health. 23, 8 p., 1075.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)46 Downloads (Pure) -
Contextual factors affecting integration of eye health into school health programme in Zanzibar: a qualitative health system research
Chan, V. F., Yard, E., Mashayo, E., Mulewa, D., Drake, L. & Omar, F., 14 Dec 2023, In: BMC Health Services Research. 23, 10 p., 1414.Research output: Contribution to journal › Article › peer-review
Open AccessFile27 Downloads (Pure) -
Effectiveness of community outreach screening for glaucoma in improving equity and access to eye care in Nigeria
Olawoye, O. O., Fawole, O., Ashaye, A. O., Chan, V. F., Azuara-Blanco, A. & Congdon, N., 01 Jan 2023, In: British Journal of Ophthalmology. 107, 1, p. 30-36Research output: Contribution to journal › Article › peer-review
3 Citations (Scopus) -
Glaucoma treatment patterns in Sub-Saharan Africa
Olawoye, O., Washaya, J., Gessesse, G. W., Balo, K., Agre, J., Macheka, B., Akaraiwe, N. K., Pons, J., Sarimiye, T., Ashaye, A., Garba, F., Chitedze, R., Ibanga, A., Mahdi, A., Ogunro, A., Budengeri, P., Ajibode, H. A., Tamrat, L., Onakoya, A. & Okeke, S. & 10 others, , 21 Jul 2023, (Early online date) In: Journal of Glaucoma.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)16 Downloads (Pure) -
How does a pair of near-vision spectacle correction empower older Zanzibari craftswomen?: a qualitative study on perception
Martins, M. F., Omar, F., Othman, O., Virgili, G., Yong, A. C., Mulewa, D., Graham, C., Price-Sanchez, C., Graham, R., Farmer, A., Mashayo, E. & Chan, V. F., 26 May 2023, In: PLOS ONE. 18, 5, 12 p., e0286315.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)31 Downloads (Pure) -
Impact of a short online course on the accuracy of non-ophthalmic diabetic retinopathy graders in recognising glaucomatous optic nerves in Vietnam
Olawoye, O. O., Ha, T. H., Pham, N., Nguyen, L., Cherwek, D. H., Fowobaje, K. R., Ross, C., Coote, M., Chan, V. F., Kahook, M., Peto, T., Azuara-Blanco, A. & Congdon, N., 09 Nov 2023, In: BMJ Open. 13, 11, 9 p., e076623.Research output: Contribution to journal › Article › peer-review
Open AccessFile42 Downloads (Pure) -
Refractive error, eye care needs and attitude towards spectacle wearing among older Zanzibari craftswomen and implications for developing women-targeted services: a cross-sectional study
Chan, V. F., Omar, F., Farmer, A., Othman, O., Yong, A. C., Graham, C., Price-Sanchez, C., Graham, R., Fernandes Martins, M. & Mashayo, E., 29 May 2023, In: BMJ Open Ophthalmology. 8, 1, 10 p., e001283.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)42 Downloads (Pure) -
Subjective Wellbeing, Work Performance and Lived Experience of Zanzibari Women Entrepreneurs with Uncorrected Functional Presbyopia: A Pre-Post Mixed-Methods Study
Chan, V. F., Fernandes Martins, M., Juma Othman, O., Yong, A. C., Mulewa, D., Graham, C., Price-Sanchez, C., Graham, R., Farmer, A., Mashayo, E. & Omar, F., 07 Nov 2023, (Early online date) In: Ophthalmic Epidemiology. 9 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile19 Downloads (Pure) -
The impact of spectacle correction on the well-being of children with vision impairment due to uncorrected refractive error: a systematic review
Pirindhavellie, G.-P., Yong, A. C., Mashige, K. P., Naidoo, K. S. & Chan, V. F., 18 Aug 2023, In: BMC Public Health. 23, 15 p., 1575.Research output: Contribution to journal › Article › peer-review
Open AccessFile8 Citations (Scopus)39 Downloads (Pure) -
Willingness to pay for diabetic retinopathy screening in Qujiang District, rural Guangdong, southern China: a cross-sectional study
Xiao, B., Gu, X., Jin, L., Chan, V. F., Li, Y., Price-Sanchez, C., Liu, Y., Wang, Y., Fu, H., Li, D. & Congdon, N., 25 Apr 2023, In: BMJ Open. 13, 4, 8 p., e065792.Research output: Contribution to journal › Article › peer-review
Open AccessFile25 Downloads (Pure) -
2022
A pilot cost-benefit analysis of a children’s spectacle reimbursement scheme: Evidence for Including children’s spectacles in Mongolia’s Social Health Insurance
Yong, A. C., Chuluunkhuu, C., Chan, V. F., Stephan, T., Congdon, N. & O'Neill, C., 15 Aug 2022, In: PLoS One. 17, 8, e0273032.Research output: Contribution to journal › Article › peer-review
Open AccessFile2 Citations (Scopus)56 Downloads (Pure) -
Can we scale up a comprehensive school-based eye health programme in Zambia?
Yong, A. C., Buglass, A., Mwelwa, G., Abdallah, I. & Chan, V. F., 25 Jul 2022, In: BMC Health Services Research. 22, 945.Research output: Contribution to journal › Article › peer-review
Open AccessFile2 Citations (Scopus)69 Downloads (Pure) -
Clinical characteristics and stage at presentation of glaucoma patients in Sub-Saharan Africa
Olawoye, O., Kizor-Akaraiwe, N., Pons, J., Sarimiye, T., Washaya, J., Hughes, S., Ashaye, A., Garba, F., Gessesse, G. W., Chitedze, R., Ibanga, A., Saka, V., Agre, J., Mahdi, A., Ogunro, A., Budengeri, P., Ajibode, H. A., Tamrat, L., Onakoya, A. & Okeke, S. & 15 others, , 01 Sept 2022, In: Journal of Glaucoma. 31, 9, p. 717-723Research output: Contribution to journal › Article › peer-review
6 Citations (Scopus) -
Co-creating an arts-based eye health education strategy in Zanzibar: process, outcomes and lessons learnt
Chan, V. F., Belluigi, D., Yong, A. C., Mulewa, D., Poonsamy-Govender, P., Graham, C., Mashayo, E., Graham, R., Price-Sanchez, C. & Omar, F., 06 Sept 2022, In: BMJ Global Health. 7, 9, 10 p., e009317.Research output: Contribution to journal › Article › peer-review
Open AccessFile3 Citations (Scopus)59 Downloads (Pure) -
Delivering Refractive Care to Populations With Near and Distance Vision Impairment: 2 Novel Social Enterprise Models
Morjaria, P., Bergson, S., Bastawrous, A., Watts, E., Pant, S., Gudwin, E., Zinn, M. & Chan, V. F., 01 Jan 2022, In: Asia-Pacific Journal of Ophthalmology. 11, 1, p. 59-65Research output: Contribution to journal › Article › peer-review
Open AccessFile2 Citations (Scopus)92 Downloads (Pure) -
Demographic characteristics and ocular needs of children attending child eye clinics in Cross River State, Nigeria: a retrospective analysis of clinical records
Yong, A. C., Ebri, A. E., O'Connor, S. E., O'Donovan, D., Congdon, N., Graham, C., Lohfeld, L., O'Neill, C. & Chan, V. F., 10 May 2022, In: BMJ Open. 12, 5, 8 p., e060379.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)54 Downloads (Pure) -
Impact of vision impairment and ocular morbidity and their treatment on depression and anxiety in children: a systematic review
Li, D., Chan, V. F., Virgili, G., Piyasena, P., Negash, H., Whitestone, N., O'Connor, S., Xiao, B., Clarke, M., Cherwek, D. H., Singh, M. K., She, X., Wang, H., Boswell, M., Prakalapakorn, S. G., Patnaik, J. L. & Congdon, N., Oct 2022, In: Ophthalmology. 129, 10, p. 1152-1170 19 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile25 Citations (Scopus)577 Downloads (Pure) -
Modelling ready-made spectacle coverage for children and adults using a large global database
Chan, V. F., Wright, D. M., Mavi, S., Dabideen, R., Smith, M., Sherif, A. & Congdon, N., 31 Oct 2022, (Early online date) In: British Journal of Ophthalmology. 5 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)38 Downloads (Pure) -
The Impact of Hyperopia on Academic Performance Among Children: A Systematic Review
Mavi, S., Chan, V. F., Virgili, G., Biagini, I., Congdon, N., Piyasena, P., Yong, A. C., Ciner, E. B., Kulp, M. T., Candy, T. R., Collins, M., Bastawrous, A., Morjaria, P., Watts, E., Masiwa, L. E., Kumora, C., Moore, B. & Little, J.-A., 20 Jan 2022, (Early online date) In: Asia-Pacific Journal of Ophthalmology.Research output: Contribution to journal › Article › peer-review
Open AccessFile22 Citations (Scopus)702 Downloads (Pure) -
Toward universal eye health coverage-key outcomes of the World Health Organization package of eye care interventions. A systematic review
Chan, V. F. & Package of Eye Care Interventions Development Group, 17 Nov 2022, (Early online date) In: JAMA Ophthalmology.Research output: Contribution to journal › Article › peer-review
7 Citations (Scopus) -
2021
Factors affecting guardians’ decision making on clinic-based purchase of children’s spectacles in Nigeria
Chan, V. F., Yong, A. C., O'Neill, C., Graham, C., Congdon, N., Lohfeld, L., Stephan, T. & Ebri, A., 12 Jul 2021, In: PLoS ONE. 16, 7, 11 p., e0254517.Research output: Contribution to journal › Article › peer-review
Open AccessFile2 Citations (Scopus)119 Downloads (Pure) -
Is an integrated model of school eye health delivery more cost effective than a vertical model? An implementation research in Zanzibar
Chan, V. F., Omar, F., Yard, E., Mashayo, E., Mulewa, D., Drake, L., Wepo, M. & Minto, H., 11 Jan 2021, In: BMJ Open Ophthalmol. 6, 6 p., e000561.Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Citations (Scopus)153 Downloads (Pure) -
Parents’ reasons for nonadherence to referral to follow-up eye care for schoolchildren who failed school-based vision screening in Cross River State, Nigeria—A descriptive qualitative study
Lohfeld, L., Graham, C., Ebri, A. E., Congdon, N. & Chan, V. F., 18 Nov 2021, (Early online date) In: PLoS ONE. 16, 11, e0259309.Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Citations (Scopus)79 Downloads (Pure) -
The prevalence and correlates of vision impairment and glasses ownership among ethnic minority and Han schoolchildren in rural China
Wang, H., Barket, B., Du, S., Friesen, D., Kohrman, E., Tok, E., Xiao, B., Huang, W., Chan, V. F., MacKenzie, G. & Congdon, N., 2021, In: PLoS ONE. 16, 8, e0256565.Research output: Contribution to journal › Article › peer-review
Open AccessFile3 Citations (Scopus)70 Downloads (Pure) -
Vision impairment and traffic safety outcomes in low-income and middle-income countries: a systematic review and meta-analysis
Piyasena, P., Olvera-Herrera, V. O., Chan, V. F., Clarke, M., Wright, D. M., MacKenzie, G., Virgili, G. & Congdon, N., 01 Oct 2021, In: The Lancet. Global health. 9, 10, p. E1411-E1422Research output: Contribution to journal › Article › peer-review
Open AccessFile16 Citations (Scopus)292 Downloads (Pure) -
2020
Disability-related-distress in primary school learners with vision impairment due to uncorrected refractive error in KwaZulu-Natal Province, South Africa – a qualitative study
Chan, V. F., Singer, S. & Naidoo, K. S., 03 Mar 2020, In: PLoS One. 15, 3, 16 p., e0229108.Research output: Contribution to journal › Article › peer-review
Open AccessFile13 Citations (Scopus)107 Downloads (Pure) -
2019
Improving the practice of cataract surgical outcome measurement
Congdon, N., Dodson, S., Chan, V. F., Mathenge, W. & Moo, E., 11 Feb 2019, In: Community Eye Health. 31, 104, p. 91-92 2 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile4 Citations (Scopus)206 Downloads (Pure) -
Prevalence of Refractive Error, Presbyopia, and Spectacle Coverage in Bogotá, Colombia: A Rapid Assessment of Refractive Error
Casas Luque, L., Naidoo, K., Chan, V. F., Silva, J. C., Naduvilath, T. J., Peña, F., Mayorga, M. & Ramírez, L., 01 Aug 2019, In: Optometry and vision science : official publication of the American Academy of Optometry. 96, 8, p. 579-586 8 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile12 Citations (Scopus)291 Downloads (Pure) -
2018
Impact of Presbyopia and Its Correction in Low- and Middle-Income Countries
Chan, V. F., MacKenzie, G. E., Kassalow, J., Gudwin, E. & Congdon, N., 07 Dec 2018, (Early online date) In: Asia-Pacific Journal of Ophthalmology. 7, 6, p. 370-374Research output: Contribution to journal › Article › peer-review
19 Citations (Scopus) -
2017
Cost and Expected Visual Effect of Interventions to Improve Follow-up After Cataract Surgery: Prospective Review of Early Cataract Outcomes and Grading (PRECOG) Study
Meltzer, M. E., Congdon, N., Kymes, S. M., Yan, X., Lansingh, V. C., Müller, A., Chan, V. F., Jin, L., Karumanchi, S. M., Guan, C., Vuong, Q., Rivera, N., McCleod-Omawale, J. & He, M., Feb 2017, In: JAMA Ophthalmology. 135, 2, p. 85-94 10 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile16 Citations (Scopus)428 Downloads (Pure) -
Improving eye health using a child-to-child approach in Bariadi, Tanzania.
Chan, V. F., Minto, H., Mashayo, E. & Naidoo, K., 23 Nov 2017, African Vision and Eye Health Journal, 76, 1 6 p.Research output: Contribution to specialist publication › Article
Open AccessFile6 Citations (Scopus)234 Downloads (Pure) -
Near vision correction and quality of life among textile workers.
Chan, V. F., Jaggernath, J., Chinanayi, F. & Naidoo, K., 30 Jun 2017, In: African Vision and Eye Health Journal. 76, 1, 6 p.Research output: Contribution to journal › Article › peer-review
Open AccessFile5 Citations (Scopus)188 Downloads (Pure) -
2016
How Do Patients Choose Their Spectacles in the Public Sector of South Africa?
Pillay, V., Chan, V. F., Chinanayi, F. & Naidoo, K., 01 Mar 2016, In: Optometry and vision science : official publication of the American Academy of Optometry.Research output: Contribution to journal › Article › peer-review
1 Citation (Scopus) -
Near vision correction and work productivity among textile workers.
Naidoo, K., Jaggernath, J., Chinanayi, F. & Chan, V. F., 16 Nov 2016, In: African Vision and Eye Health Journal. p. 1-4Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Citations (Scopus)60 Downloads (Pure) -
Uncorrected refractive errors, presbyopia and spectacle coverage in Kamuli District, Uganda.
Nsubuga, N., Ramson, P., Govender, P., Chan, V. F., Wepo, M. & Naidoo, K., 15 Jun 2016, In: African Vision and Eye Health Journal.Research output: Contribution to journal › Article › peer-review
Open AccessFile11 Citations (Scopus)168 Downloads (Pure) -
2015
Prevalence of refractive error, presbyopia and spectacle coverage in Kahama District, Tanzania: a rapid assessment of refractive error.
Mashayo, E., Chan, V. F., Chinanayi, F., Ramson, P. & Naidoo, K., 2015, In: Clinical & Experimental Optometry.Research output: Contribution to journal › Article › peer-review
Open Access32 Citations (Scopus) -
School eye health- going beyond refractive error.
Minto, H., Yasmin, S. & Chan, V. F., 2015, In: Community Eye Health.Research output: Contribution to journal › Article › peer-review
2 Citations (Scopus) -
Student Educational Background, Perceptions and Expectations towards Optometry: an Emerging Eye Health Profession Mozambique.
Chan, V. F., Loughman, J., Moodley, V. & Naidoo, K., 2015, In: Journal of Optometric Education.Research output: Contribution to journal › Article › peer-review
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2014
Poverty and Eye Health
Jaggernath, J., Overland, L., Ramson, P., Kovai, V., Chan, V. F. & Naidoo, K., 2014, In: Health.Research output: Contribution to journal › Article › peer-review
Open Access -
2013
Assessment of cataract surgical outcomes in settings where follow-up is poor: PRECOG, a multicentre observational study
Congdon, N., Yan, X., Lansingh, V., Sisay, A., Müller, A., Chan, V., Jin, L., Meltzer, M. E., Karumanchi, S. M., Guan, C., Vuong, Q., Rivera, N., McCleod-Omawale, J. & He, M., Sept 2013, In: The Lancet Global Health. 1, 1Research output: Contribution to journal › Article › peer-review
53 Citations (Scopus) -
Prevalence of Presbyopia and Spectacle Coverage in an African Population in Durban, South Africa
Naidoo, K., Jaggernath, J., Martin, C. & Chan, V. F., 2013, In: Optometry and vision science : official publication of the American Academy of Optometry.Research output: Contribution to journal › Article › peer-review
Open Access23 Citations (Scopus) -
Prevalence of Refractive Error and Spectacle Coverage in Zoba Ma’ekel Eritrea: A Rapid Assessment of Refractive Error.
Chan, V. F., Mebrahtu, G., Ramson, P., Wepo, M. & Naidoo, K., 2013, In: Ophthalmic Epidemiology.Research output: Contribution to journal › Article › peer-review
Open Access42 Citations (Scopus)