An analytical study of 50 cases on causes of amblyopia.

Ramasubramanian, R (2007) An analytical study of 50 cases on causes of amblyopia. Masters thesis, Madras Medical College, Chennai.


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INTRODUCTION: It is a condition with unilateral (or) bilateral decrease of visual function caused by form vision deprivation and (or) abnormal visual interaction, that cannot be explained by a disorder of ocular media (or) visual path ways itself. In appropriate cases it is reversible by therapeutic measures. It is caused by abnormal visual experience during early childhood, the critical period of development. PREVALENCE: It affects approximately 1-4% of the general population. AIMS AND OBJECTIVES To find out the relative proportions of different types of ambloypia in a referral centre. To study the characteristics associated with different types of amblyopia in our population the extent of visual impairment produced by different types of amblyopia at presentation. METHODS AND MATERIALS Over a period of two years 2004 October to 2006 September, 1800 patients were seen in strabismus and Paediatric Ophthalmology clinic at RIOGDH, Chennai. This is a prospective study of 50 cases of amblyopia. DISCUSSION: Amblyopia is one of the most common causes of visual impairment in both children and adults. It affects 4-5% of general population and its incidence in paediatric ophthalmology and squint clinic is 30-35%. CONCLUSION The prevalence of amblyopia in our squint and neruophthalmology clinic was 30-35%. Amblyopia is a very common cause of impaired vision in child hood. The incidence of anisometropic and ametropic amblyopia is compared to be less in our population compared to western countries. 94% of the patient in our study had squint. Hypermetropia is the most common refractive error associated with the amblyopia followed by myopia and astigmatism . Esotropia is the most common form of strabismus associated with the amblyopia. 10% of patients with amblyopia had low birth weight. 12% of patients had family history of strabismus. The relative proportion of rural population compared to urban population is higher. 8% of patients with amblyopia in our study had Nystagmus. 42% of patients in our study had low vision C 6/60. Earlier diagnosis and health education and screening programmes in rural areas can reduce the prevalence of amblypias.

Item Type: Thesis (Masters)
Uncontrolled Keywords: amblyopia; case study
Subjects: MEDICAL > Ophthalmology
Depositing User: Devi S
Date Deposited: 31 Jul 2017 05:42
Last Modified: 31 Jul 2017 05:42

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