Table 3. Retinal layer thicknesses measured by spectral domain optical coherence tomography in both eyes of all patients with unilateral traumatic optic neuropathy.

All measurements were significantly smaller in TON eyes than those in unaffected eyes. (Wilcoxon sign rank test).

Variable	Affected eyes (n = 29)	Unaffected eyes (n = 29)	p-value*
	Mean ±SD (%)a	Mean ±SD
Thickness (μm)
cpRNFL
Temporal	59±25 (23%)	77±14	<0.01*
Nasal	51±26 (20%)	64±15	<0.01*
Superior	101±35 (22%)	129±17	<0.01*
Inferior	98±37 (21%)	124±16	<0.01*
Entire retina
Inner locations
Inner temporal	278±10 (3%)	289±22	<0.01*
Inner nasal	286±20 (3%)	296±26	<0.01*
Inner superior	290±18 (3%)	299±21	<0.01*
Inner inferior	291±17 (3%)	298±21	0.03*
Outer locations
Outer temporal	319±22 (4%)	333±15	<0.01*
Outer nasal	335±30 (6%)	358±22	<0.01*
Outer superior	336±28 (6%)	356±17	<0.01*
Outer inferior	327±29 (5%)	344±18	<0.01*
fRNFL
Outer locations
Outer temporal	14±6 (12%)	16±3	<0.01*
Outer nasal	20±10 (29%)	28±5	<0.01*
Outer superior	27±14 (32%)	40±5	<0.01*
Outer inferior	27±12 (36%)	42±6	<0.01*
GCIPL
Inner locations
Inner temporal	33±12 (25%)	44±14	<0.01*
Inner nasal	35±12 (26%)	47±13	<0.01*
Inner superior	37±16 (26%)	50±12	<0.01*
Inner inferior	38±15 (25%)	51±12	<0.01*
Outer locations			<0.01*
Outer temporal	72±21 (20%)	90±9	<0.01*
Outer nasal	74±23 (24%)	97±13	<0.01*
Outer superior	71±19 (20%)	89±9	<0.01*
Outer inferior	73±17 (19%)	90±9	<0.01*

SD, standard deviation; cpRNFL, peripapillary retinal nerve fiber layer; fRNFL, foveal retinal nerve fiber layer; GCIPL, ganglion cell layer and inner plexiform layer

^a % change of the affected eye compared with the contralateral eye

* p < 0.05, Wilcoxon sign-rank test