Table 4 Equations for Calculating the EV (y) and IOD Values (x) for Chinese Han Subjects

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

Age Group

N

OS

OP

Equations

F value

Equations

F value

Children

515

y = 0.188x − 5.110

298.9

y = 0.187x − 4.994

297.8

Teenagers

517

y = 0.142x − 0.369

79.1

y = 0.150x − 1.204

82.6

Adults

582

y = 0.140x + 0.150

65.4

y = 0.144x − 0.235

67.5

Elderly

396

y = 0.143x − 0.475

41.4

y = 0.153x − 1.638

46.1

  1. Abbreviations: EV, exophthalmometric value; IOD, inter-orbital distance; OS, left eye; OD, right eye.