In vivo quantification of human aqueous veins by enhanced depth imaging optical coherence tomography and optical coherence tomography angiography images

AIM: To investigate the aqueous vein in vivo by using enhanced depth imaging optical coherence tomography (EDI-OCT) and angiography (OCTA). METHODS: In this cross-sectional comparative study, 30 healthy participants were enrolled. Images of conjunctival veins captured EDI-OCT OCTA before after water loading. The area, height, width, location blood flow measured Image J software. RESULTS: static state, area was 8166.7±3272.7 μm2, which smaller than that (13 690±7457 P<0.001). mean density 35.3%±12.6%, significantly less (51.5%±10.6%, After loading, decreased from 8725.8±779.4 μm2 (baseline) to 7005.2±566.2 at 45min but rose 7863.0±703.2 60min (P=0.032). 41.2%±4.5% 35.4%±3.2% 30min returned 45.6%±3.6% (P=0.021). CONCLUSION: structure can be effectively evaluated OCT OCTA. These may become biological indicators evaluate changes outflow resistance under different interventions glaucoma patients.