Variations in Eyeball Diameters of the Healthy Adults

Table 1

Eyeball and orbit diameters measured by computed tomography.

Diameter (mm)	Right eyeball/orbit			Left eyeball/orbit
	Median ± SD	Max	Min	Median ± SD	Max	Min
Eyeball
Transverse (r-r)^*	22.822 ± 1.7	25.5	20.0	22.936 ± 1.8	25.8	19.4
Transverse (s-s)^**	24.156 ± 1.9	26.8	21.5	24.324 ± 1.9	27.1	20.9
Sagittal (r-r)	22.547 ± 1.2	25.1	20.0	22.604 ± 1.1	24.9	19.7
Sagittal (s-s)	23.799 ± 1.6	26.4	21.2	23.752 ± 1.7	25.6	20.5
Axial, Group I^***	24.477 ± 1.8	26.2	20.0	24.893 ± 2.2	25.8	20.7
Axial, Group II^****	23.422 ± 1.9	25.7	20.3	23.562 ± 1.9	25.4	19.9
Axial, Group III^*****	22.307 ± 2.2	25.7	20.6	22.096 ± 1.9	24.7	20.4
Orbit
Height of margin	41.075 ± 2.4	44.6	39.4	42.550 ± 2.5	44.8	38.8
Width of margin	35.327 ± 2.2	37.0	32.7	35.862 ± 2.2	37.4	32.9
Depth of orbit	47.732 ± 4.6	55.4	38.8	48.396 ± 4.7	55.7	38.7

(r-r): retina to retina.
^**(s-s): sclera to sclera.
^***Myopia.
^****Emmetropia.
^*****Hypermetropia.