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Effect of orbital volume in unilateral orbital fracture on indirect traumatic optic neuropathy

 Wirapha Senarak  ;  Atapol Yongvikul  ;  Jeong-Kui Ku  ;  Jae-Young Kim  ;  Jong-Ki Huh 
 INTERNATIONAL OPHTHALMOLOGY, Vol.43(4) : 1121-1126, 2023-04 
Journal Title
Issue Date
Humans ; Optic Nerve Injuries* / diagnosis ; Optic Nerve Injuries* / etiology ; Orbit / diagnostic imaging ; Orbital Fractures* / complications ; Orbital Fractures* / diagnosis ; Retrospective Studies ; Tomography, X-Ray Computed
Computed tomography ; Optic neuropathy ; Orbital fracture ; Orbital volume ; Traumatic optic neuropathy
Purpose: This retrospective study aimed to analyze the relationship between the volume of the fractured and the normal orbit in patients with unilateral orbital fractures with and without indirect traumatic optic neuropathy (TON).

Subjects: Data of 25 patients with unilateral orbital fractures who underwent computer tomography between January 2016 and December 2020 were investigated. Emergency imaging was performed within 2 hours of arrival at the emergency room. The subjects were categorized into two groups: unilateral orbital fractures with and without TON.

Methods and measures: The assessment of TON was performed during a comprehensive ophthalmologic examination by an ophthalmologist. The stereographic orbit was reconstructed, and the volume was calculated. Other variables examined included age, sex, and cause of orbital trauma. The variables were compared using paired t-tests. Statistical significance was set at p < 0.05.

Results: The orbital volume of the non-fractured orbit was 27.50 ± 2.26 and 27.48 ± 2.64 cm3 in the groups with and without TON, respectively. The average volume of the fractured orbit in the TON group was 27.78 ± 2.56 cm3, and there was no significant volumetric difference between the fractured and non-fractured sides in this group. However, the average volume of the fractured orbit without TON was 28.76 ± 3.18 cm3, larger than that of the non-fractured orbit (p = 0.016).

Conclusions: Non-expansion of the fractured orbit was a risk factor for indirect TON in patients with unilateral orbital fractures. Volumetric analysis from primary imaging would expedite the diagnosis and treatment of TON, resulting in optimal outcomes.
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2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Jae Young(김재영) ORCID logo https://orcid.org/0000-0002-9423-438X
Huh, Jong Ki(허종기) ORCID logo https://orcid.org/0000-0002-7381-3972
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