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Aims of this study were to determine the normal range of absolute and relative Hertel exophthalmometric values (EVs) in a Chinese Han population. This population-based cross-sectional study consisted of 2010 healthy Han Chinese (1051 females and 959 males) aged between 8–87 years living in Shenyang, Northeast China, including 515 children (aged 8–14 years), 517 teenagers (aged 15–19 years), 582 adults (aged 20–69 years) and 396 elderly (aged 70–87 years). A Hertel exophthalmometer was used by the same physician for the measurement of EV and inter-orbital distance (IOD). For the entire study population, the Hertel EVs ranged from 10 mm to 22 mm; the mean EVs for the left eye (OS) and right eye (OD) were 15.0 ± 1.9 mm and 15.0 ± 2.0 mm, respectively; the upper normal limits of the EVs (mean + 2 SD) for OS and OD were 18.8 mm and 19.0 mm, respectively; the mean relative EV was 0.20 ± 0.43 mm. Age, but not sex, had a significant effect on the EV. We concluded that our study provides normative ophthalmic data in a Chinese Han population. The normal EVs, asymmetry and IOD values have been established for clinical reference.

Normal Values of Hertel Exophthalmometry in a Chinese Han Population from Shenyang, Northeast China