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Ultrasonographic ocular diameters in Nigerians
1Department of Radiology, University of Benin Teaching Hospital, PMB 1111, Benin City. Drosesogieobeide@Yahoo.Com
West African Journal of Medicine
|September 19, 2009
Summary
Biometric ultrasonography reveals that Nigerian eyes have smaller axial eyeball diameters compared to Caucasians. These findings provide essential reference values for ocular measurements in African populations.
Area of Science:
- Ophthalmology
- Biometry
- Medical Imaging
Background:
- Limited data exists on ocular biometric ultrasonography in African populations.
- Eyeball diameters are critical for intraocular lens power calculation and diagnosing refractive errors like myopia and hyperopia.
Purpose of the Study:
- To establish normative ocular diameters using biometric ultrasonography in a healthy Nigerian cohort.
- To provide reference data for ocular dimensions in Africans.
Main Methods:
- Biometric ultrasonography (B-mode) with a 6.5 MHz transducer was employed on 400 eyes from 200 Nigerian volunteers.
- Vertical, horizontal, and axial eyeball diameters were measured, along with subject age and sex.
Main Results:
- The mean axial eyeball diameter was 21.7 ± 0.16 mm.
- Eyeball diameters showed a positive correlation with age, with the elderly group exhibiting the largest measurements.
- While males had slightly larger mean diameters than females, the difference was not statistically significant.
Conclusions:
- The measured eyeball diameters in Nigerians are smaller than those reported in Caucasian populations.
- These normative values serve as a crucial reference for ophthalmological assessments in African individuals.
