Normal Values of Hertel Exophthalmometry in Children, Teenagers, and Adults from Tehran, Iran
- 1 October 2008
- journal article
- case report
- Published by Ovid Technologies (Wolters Kluwer Health) in Optometry and Vision Science
- Vol. 85 (10), 1012-1017
- https://doi.org/10.1097/opx.0b013e3181890dc7
Abstract
Purpose. The aim of this study was to present normative values of exophthalmometry in Iranian children, teenagers, and adults and find the effect of age, gender, height, weight, and laterality (right vs. left eye) on normal values of protrusion. Methods. In a population-based epidemiological study, ocular protrusion values (mm) were measured in 1063 randomly selected (stratified sampling method) normal subjects using the Hertel exophthalmometer. Weight and height were measured in all subjects. Results. There were 462 (43.5%) females and 601 (56.5%) males. The age ranged from 6 to 70 years (mean ± SD = 20.3 ± 10.9). Subjects were divided into three age groups (years); children (range: 6 to 12, mean: 9.2 ± 1.6), teenagers (range: 13 to 19, mean: 15 ± 1.4), and adults (range: 20 to 70, mean: 31 ± 7.9). The mean (±SD) absolute ocular protrusion value was 14.2 ± 1.8 in children, 15.2 ± 1.9 for teenagers, and 14.7 ± 2.3 for adults. Right and left eye protrusions were well correlated (r = 0.97, p < 0.0005 in children and adults and r = 0.95, p < 0.0005 in teenagers). However, right eye protrusion was significantly more than on the left side (p < 0.0005). Although males had more eye protrusion, the gender difference was not significant except for teenagers. Weight and height did not have a significant effect on eye protrusion. No individual had more than 2 mm of asymmetry (relative eye protrusion). Increasing age had a significant effect on the eye protrusion (r = +0.32 for children, r = +0.13 for teenagers, and r = −0.30 for adults; 0.001 < p < 0.0005). The ocular protrusion was positively correlated with increasing distance between the two lateral orbital rims (base) in all age groups (p < 0.0005). Conclusions. Any eye protrusion of more than 17.8 mm for Iranian children, 19 mm for Iranian teenagers, and 19.3 mm for Iranian adults and relative eye protrusion of more than 2 mm warrants further clinical examination. Age and base value had a significant impact on normal eye protrusion values.Keywords
This publication has 12 references indexed in Scilit:
- Dependence of ocular protrusion, asymmetry of protrusion and lateral interorbital width on ageActa Ophthalmologica, 2009
- Normal Range of Exophthalmos Values on Orbit Computerized Tomography in KoreansOphthalmologica, 2001
- ExophthalmometryOphthalmic Plastic & Reconstructive Surgery, 1997
- Normal Values of Ocular Protrusion in Saudi Arabian Male ChildrenOptometry and Vision Science, 1995
- Normal Values of Eye Position and Head Size in Chinese Children from Hong KongOptometry and Vision Science, 1993
- Normative Data for Hertel Exophthalmometry in a Normal Adult Black PopulationOptometry and Vision Science, 1992
- Normal Values of Eye Position in the Chinese Population of Hong KongOptometry and Vision Science, 1992
- Normal Exophthalmometric Values in ChildrenAmerican Journal of Ophthalmology, 1989
- Changes in eye position during growth and adult lifeActa Ophthalmologica, 1986
- Determination of the Normal Range of Exophthalmometric Values for Black and White AdultsAmerican Journal of Ophthalmology, 1984