Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan
BACKGROUND: Few studies have examined the prevalence of convergence insufficiency (CI) in a school-based population in Sudan. This study sought to determine the prevalence of CI and its related clinical characteristics among Sudanese secondary school students. MATERIALS AND METHODS: A descriptive cr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2018-01-01
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| Series: | Oman Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.ojoonline.org/article.asp?issn=0974-620X;year=2018;volume=11;issue=2;spage=129;epage=133;aulast=Hassan |
| _version_ | 1818062527177687040 |
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| author | Layali Ibrahim Hassan Samira Mohamed Ibrahim Mustafa Abdu Asma MohamedSharif |
| author_facet | Layali Ibrahim Hassan Samira Mohamed Ibrahim Mustafa Abdu Asma MohamedSharif |
| author_sort | Layali Ibrahim Hassan |
| collection | DOAJ |
| description | BACKGROUND: Few studies have examined the prevalence of convergence insufficiency (CI) in a school-based population in Sudan. This study sought to determine the prevalence of CI and its related clinical characteristics among Sudanese secondary school students.
MATERIALS AND METHODS: A descriptive cross-sectional survey was conducted in Central Khartoum North, Sudan, in the academic year 2013/2014. A total of 4211 secondary school students, with a mean age of 15.5 ± 2.5 years, underwent complete eye examination, and were screened for symptoms associated with near work. Near and distance heterophoria was measured with the alternate cover test using a prism bar; near point of convergence (NPC) and positive fusional vergence (PFV) at near were determined.
RESULTS: Of the 4211 students screened, 329 (7.8%) were diagnosed with CI. Of these, 173 (52.6%) students were male and 156 (47.4%) were female; there was no significant relationship between sex and CI (P > 0.05). Standard schools had a higher prevalence of CI (43%) than geographic schools (36%) and there was a significant association between CI and the type of school (P < 0.05). In most of the students (78.42%), CI was due to both remote NPC and decreased PFV; in 20.36% of the students, CI was due to remote NPC only, and in very few students (1.22%), it was due to decreased PFV only.
CONCLUSIONS: These findings suggest that CI is prevalent in the secondary school population in Central Khartoum North, Sudan. |
| first_indexed | 2024-12-10T14:05:37Z |
| format | Article |
| id | doaj.art-94eea5afbd894613a9b4cbefa5b4e354 |
| institution | Directory Open Access Journal |
| issn | 0974-620X |
| language | English |
| last_indexed | 2024-12-10T14:05:37Z |
| publishDate | 2018-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Oman Journal of Ophthalmology |
| spelling | doaj.art-94eea5afbd894613a9b4cbefa5b4e3542022-12-22T01:45:41ZengWolters Kluwer Medknow PublicationsOman Journal of Ophthalmology0974-620X2018-01-0111212913310.4103/ojo.OJO_170_2017Prevalence of convergence insufficiency among secondary school students in Khartoum, SudanLayali Ibrahim HassanSamira Mohamed IbrahimMustafa AbduAsma MohamedSharifBACKGROUND: Few studies have examined the prevalence of convergence insufficiency (CI) in a school-based population in Sudan. This study sought to determine the prevalence of CI and its related clinical characteristics among Sudanese secondary school students. MATERIALS AND METHODS: A descriptive cross-sectional survey was conducted in Central Khartoum North, Sudan, in the academic year 2013/2014. A total of 4211 secondary school students, with a mean age of 15.5 ± 2.5 years, underwent complete eye examination, and were screened for symptoms associated with near work. Near and distance heterophoria was measured with the alternate cover test using a prism bar; near point of convergence (NPC) and positive fusional vergence (PFV) at near were determined. RESULTS: Of the 4211 students screened, 329 (7.8%) were diagnosed with CI. Of these, 173 (52.6%) students were male and 156 (47.4%) were female; there was no significant relationship between sex and CI (P > 0.05). Standard schools had a higher prevalence of CI (43%) than geographic schools (36%) and there was a significant association between CI and the type of school (P < 0.05). In most of the students (78.42%), CI was due to both remote NPC and decreased PFV; in 20.36% of the students, CI was due to remote NPC only, and in very few students (1.22%), it was due to decreased PFV only. CONCLUSIONS: These findings suggest that CI is prevalent in the secondary school population in Central Khartoum North, Sudan.http://www.ojoonline.org/article.asp?issn=0974-620X;year=2018;volume=11;issue=2;spage=129;epage=133;aulast=HassanConvergence insufficiencyprevalencestudents |
| spellingShingle | Layali Ibrahim Hassan Samira Mohamed Ibrahim Mustafa Abdu Asma MohamedSharif Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan Oman Journal of Ophthalmology Convergence insufficiency prevalence students |
| title | Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan |
| title_full | Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan |
| title_fullStr | Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan |
| title_full_unstemmed | Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan |
| title_short | Prevalence of convergence insufficiency among secondary school students in Khartoum, Sudan |
| title_sort | prevalence of convergence insufficiency among secondary school students in khartoum sudan |
| topic | Convergence insufficiency prevalence students |
| url | http://www.ojoonline.org/article.asp?issn=0974-620X;year=2018;volume=11;issue=2;spage=129;epage=133;aulast=Hassan |
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