Prevalence and causes of monocular childhood blindness in a rural population in southern India

Parasappa Bandrakalli, Sunil Ganekal, Vishal Jhanji, Yuan Bo Liang, Syril Dorairaj

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Purpose: To determine the prevalence and etiology of childhood monocular blindness in a rural population in southern India. Methods: A total of 14,423 children younger than 15 years in randomly selected villages (8,222 households) with a total population of 40,336 were screened. Screening was performed in two stages. In the fi rst stage, all children with visual acuity worse than 6/18 in at least one eye were screened. Subsequently, children with visual acuity worse than 3/60 in one eye were referred to a tertiary care hospital for further examination for determination of the cause of visual impairment. Results: The age range of aff ected children was 1 to 15 years (median age: 12 years). Fifteen children had monocular visual impairment, yielding a prevalence rate of 1.13 in 1,000 children. Refractive error leading to amblyopia was the most common cause of monocular visual impairment, followed by trauma, congenital disorders, and vitamin A defi ciency. One case had toxoplasmosis. Approximately one-third of the children were born of a consanguineous marriage (30.06%). The proportion of fi rst-degree consanguinity (46.4%) was higher than that of second-degree (37.5%) or third-degree (16.1%) consanguinity. Conclusion: The prevalence of childhood monocular blindness was high in the current study, but most causes were preventable or treatable. Improved screening methods (especially for refractive errors), genetic counseling, and therapeutic interventions can reduce the burden of childhood blindness.

Original languageEnglish (US)
Pages (from-to)303-307
Number of pages5
JournalJournal of pediatric ophthalmology and strabismus
Volume49
Issue number5
DOIs
StatePublished - Dec 1 2012
Externally publishedYes

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Rural Population
Blindness
India
Vision Disorders
Consanguinity
Refractive Errors
Visual Acuity
Congenital, Hereditary, and Neonatal Diseases and Abnormalities
Amblyopia
Toxoplasmosis
Genetic Counseling
Tertiary Healthcare
Marriage
Vitamin A
Tertiary Care Centers
Wounds and Injuries
Population

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Ophthalmology

Cite this

Prevalence and causes of monocular childhood blindness in a rural population in southern India. / Bandrakalli, Parasappa; Ganekal, Sunil; Jhanji, Vishal; Liang, Yuan Bo; Dorairaj, Syril.

In: Journal of pediatric ophthalmology and strabismus, Vol. 49, No. 5, 01.12.2012, p. 303-307.

Research output: Contribution to journalArticle

Bandrakalli, Parasappa ; Ganekal, Sunil ; Jhanji, Vishal ; Liang, Yuan Bo ; Dorairaj, Syril. / Prevalence and causes of monocular childhood blindness in a rural population in southern India. In: Journal of pediatric ophthalmology and strabismus. 2012 ; Vol. 49, No. 5. pp. 303-307.
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AB - Purpose: To determine the prevalence and etiology of childhood monocular blindness in a rural population in southern India. Methods: A total of 14,423 children younger than 15 years in randomly selected villages (8,222 households) with a total population of 40,336 were screened. Screening was performed in two stages. In the fi rst stage, all children with visual acuity worse than 6/18 in at least one eye were screened. Subsequently, children with visual acuity worse than 3/60 in one eye were referred to a tertiary care hospital for further examination for determination of the cause of visual impairment. Results: The age range of aff ected children was 1 to 15 years (median age: 12 years). Fifteen children had monocular visual impairment, yielding a prevalence rate of 1.13 in 1,000 children. Refractive error leading to amblyopia was the most common cause of monocular visual impairment, followed by trauma, congenital disorders, and vitamin A defi ciency. One case had toxoplasmosis. Approximately one-third of the children were born of a consanguineous marriage (30.06%). The proportion of fi rst-degree consanguinity (46.4%) was higher than that of second-degree (37.5%) or third-degree (16.1%) consanguinity. Conclusion: The prevalence of childhood monocular blindness was high in the current study, but most causes were preventable or treatable. Improved screening methods (especially for refractive errors), genetic counseling, and therapeutic interventions can reduce the burden of childhood blindness.

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