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Ocular biometry and refraction in Mongolian adults
Sanjeewa Wickremasinghe1, Paul J Foster, Davaatseren Uranchimeg
1Moorfields Eye Hospital, London, United Kingdom.
Investigative Ophthalmology & Visual Science
|February 27, 2004
Summary
Adult Mongolians show lower myopia prevalence than other East Asians. Axial length (AL) and visual cortex depth (VCD) significantly influence refractive error, with hyperopia and astigmatism increasing with age.
Area of Science:
- Ophthalmology
- Population Health
- Biometry
Background:
- Ocular biometry and refractive error prevalence vary significantly across global populations.
- Understanding these variations is crucial for public health initiatives and clinical practice.
Purpose of the Study:
- To investigate ocular biometry and its association with refractive error in adult Mongolians.
- To compare findings with other East Asian populations.
Main Methods:
- A population-based survey was conducted on 1617 adult Mongolians (≥40 years) in two provinces.
- Measurements included axial length (AL), corneal power (CP), and noncycloplegic autorefraction.
- Multiple regression models analyzed determinants of refractive error.
Main Results:
- Mean AL was 23.13 ± 1.15 mm, with a slight age-related increase.
- Prevalence rates: myopia (17.2%), emmetropia (49.9%), hyperopia (32.9%), astigmatism (40.9%), anisometropia (10.7%).
- Axial length (AL) and visual cortex depth (VCD) were key determinants of refractive error.
Conclusions:
- Adult Mongolians exhibit a lower myopia prevalence compared to other studied East Asian populations.
- Mean AL showed minimal variation across age groups, contrasting with Chinese populations.
- Hyperopia, astigmatism, and anisometropia prevalence increased with age.