Background: To analyze the final visual acuity (VA) of neuro-ophthalmologic injuries (NOI) in combat ocular trauma and to study the association of NOI with systemic neurologic injury (SNI) and traumatic brain injury (TBI).
Methods: The Walter Reed Ocular Trauma Database was reviewed. Inclusion criteria were any US service member and Department of Defense civilians who suffered NOI, SNI, or TBI in Operation Iraqi Freedom or Operation Enduring Freedom. The primary outcome measure was the rate of poor final VA in patients with an NOI with secondary outcome measures the rate of SNI and TBI. in patients with NOI.
Results: One hundred seventy-eight (20.00%) of 890 eyes had an NOI. Optic nerve injury was observed in 79 (44.38%) eyes, other cranial nerve injury in 68 (38.20%), Horner syndrome in 4 (2.25%), diplopia in 45 (25.28%), and ptosis in 13 (7.30%). In patients with NOI, 76 (42.69%) eyes had a final VA less than 20/200. In injured eyes (n = 359) of patients (n = 251) with TBI, 154 eyes (34.26%) had a final VA less than 20/200. In multivariate analysis, optic nerve injury (P < 0.001), unlike TBI (P = 0.47), was associated with final VA less than 20/200. SNI (n = 229) had a statistically significant association (odds ratio 29.8, 95% confidence interval 19.2-47.8, P < 0.001) with NOI. Optic nerve injury and cranial nerve injury were associated with TBI and SNI (all, P < 0.001).
Conclusion: Optic nerve injury and cranial nerve injury are associated with TBI and SNI. Optic nerve injury, but not TBI or cranial nerve injury, is associated with a poor final VA.
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