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Lens power in Iranian schoolchildren: a population-based study
Hassan Hashemi1, Reza Pakzad1, Rafael Iribarren2
1Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran.
The British Journal of Ophthalmology
|September 2, 2017
Summary
Lens power (LP) decreases with age in children aged 6-12 years. Factors like axial length and lens thickness significantly influence LP, impacting refractive error development.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Biometry
Background:
- Accurate measurement of lens power (LP) is crucial for understanding refractive development in children.
- Previous studies have explored various ocular parameters, but comprehensive analysis in specific age groups and geographical locations is ongoing.
Purpose of the Study:
- To evaluate the lens power (LP) in schoolchildren aged 6-12 years in Shahroud, Iran.
- To identify factors influencing lens power in this pediatric population.
Main Methods:
- A cross-sectional study involving 4870 schoolchildren (aged 6-12 years) in Shahroud, Iran.
- Measurements included biometry, visual acuity, and non-cycloplegic/cycloplegic refraction.
- Lens power was calculated using the Bennett formula.
Main Results:
- The mean lens power (LP) was 22.86 diopters (D), decreasing with age from 6 to 12 years.
- LP was higher in girls, rural children, and those with hyperopia.
- Lens thickness, anterior chamber depth, and female sex were associated with increased LP, while axial length, corneal power, spherical equivalent, and age were associated with decreased LP.
Conclusions:
- Lens power (LP) in schoolchildren aged 6-12 years decreases with age.
- LP is significantly associated with axial length, lens thickness, anterior chamber depth, corneal power, spherical equivalent, and sex.
