Muhammad Hanif, Syed Hassan Massana, Sana Zahra.
Frequency of Juvenile Onset Myopia in Children Between 7 to 16 Years of Age.
Al-Shifa J Ophthalmol Jan ;14(1):8-13.

Introduction: Myopia is a type of refractive error in which eye possesses too much optical power for its axial length. Myopia with onset between 7 years to 16 years of age is called juvenile onset myopia. In the myopic eye (with accommodation relaxed) light rays from an object at infinity converge too soon and thus focus in front of retina. Objectives: To determine the frequency of juvenile onset myopia in children between 7 to 16 years of age Study Design: Descriptive, cross-sectional study. Study Duration: 15th August 2015 to 14th February 2016. Materials & Methods: A total of 300 children aged between 7 and 16 years presenting with decreased vision for at least 1 month or longer as diagnosed on logMAR chart with values greater than 0.3 which is equivalent to 6/12 on Snellen were included. Patients with disorders of the eye other than refractive errors and anisometropia were excluded. According to study objective the patient age was categorized from 07 to 16 years. Results: Mean age was 12.32 +- 2.84 years. Majority of the patients 167 (62.33%) were between 13 to 16 years of age. Out of the 300 patients, 193 (64.33%) were male and 107 (35.67%) were females with male to female ratio of 1.8:1. Juvenile onset myopia was found in 94 (31.33%) patients, whereas there was no Juvenile onset myopia in 206 (68.67%) patients. Conclusion: This study concluded that there is high frequency of juvenile onset myopia with higher percentage between 13-16 years of age and in females.

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