Analyses of Foveal Avascular Zone in Patients with General Blunt Ocular Trauma Using Optical Coherence Tomography Angiography
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Purpose: To investigate the effect of blunt ocular trauma (BOT) on foveal circulation, and in particular the foveal avascularzone (FAZ), using optical coherence tomography angiography (OCTA). Methods: This retrospective study consisted of 96 eyes (48 traumatized eyes and 48 nontraumatized eyes) from 48 subjectswith BOT. We analyzed the FAZ area of deep capillary plexus (DCP) and superficial capillary plexus (SCP) immediately afterBOT and at 2 weeks after BOT. We also evaluated the FAZ area of DCP and SCP in patients with and without blowout fracture(BOF). Results: There were no significant differences in FAZ area between traumatized and nontraumatized eyes at DCP and SCP inthe initial test. In traumatized eyes, the FAZ area at SCP was significantly reduced on follow-up when compared to initial test(p = 0.01). In case of eyes with BOF, there was no significant differences in FAZ area between traumatized and nontraumatizedeyes at DCP and SCP on initial test. No significant difference of FAZ area was found on follow-up relative to the initialtest, whether in the DCP or SCP. In case of eyes without BOF, there was no significant differences of FAZ area between traumatizedand nontraumatized eyes at DCP and SCP in initial test. Also, no significant difference of FAZ area at DCP was foundon follow-up test compared to initial test. However, the FAZ area at SCP was significantly reduced in follow-up test comparedwith that in the initial test (p = 0.04). Conclusions: Temporary microvascular ischemia occurs in the SCP of patients after BOT. Patients should be warned of transientischemic changes that may occur after trauma. OCTA can provide useful information regarding the subacute changes inthe FAZ at SCP after BOT, even without evident findings of structural damage on fundus examination.
Abstract
Purpose: To investigate the effect of blunt ocular trauma (BOT) on foveal circulation, and in particular the foveal avascularzone (FAZ), using optical coherence tomography angiography (OCTA). Methods: This retrospective study consisted of 96 eyes (48 traumatized eyes and 48 nontraumatized eyes) from 48 subjectswith BOT. We analyzed the FAZ area of deep capillary plexus (DCP) and superficial capillary plexus (SCP) immediately afterBOT and at 2 weeks after BOT. We also evaluated the FAZ area of DCP and SCP in patients with and without blowout fracture(BOF). Results: There were no significant differences in FAZ area between traumatized and nontraumatized eyes at DCP and SCP inthe initial test. In traumatized eyes, the FAZ area at SCP was significantly reduced on follow-up when compared to initial test(p = 0.01). In case of eyes with BOF, there was no significant differences in FAZ area between traumatized and nontraumatizedeyes at DCP and SCP on initial test. No significant difference of FAZ area was found on follow-up relative to the initialtest, whether in the DCP or SCP. In case of eyes without BOF, there was no significant differences of FAZ area between traumatizedand nontraumatized eyes at DCP and SCP in initial test. Also, no significant difference of FAZ area at DCP was foundon follow-up test compared to initial test. However, the FAZ area at SCP was significantly reduced in follow-up test comparedwith that in the initial test (p = 0.04). Conclusions: Temporary microvascular ischemia occurs in the SCP of patients after BOT. Patients should be warned of transientischemic changes that may occur after trauma. OCTA can provide useful information regarding the subacute changes inthe FAZ at SCP after BOT, even without evident findings of structural damage on fundus examination.
참고문헌 (41)
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