| Analysis of Foveal Microvascular Structures Using Optical Coherence Tomography Angiography in Age-stratified Healthy Koreans. |
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Donghyoun Noh, Gahyung Ryu, Min Sagong |
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Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Korea. msagong@ynu.ac.kr |
| 정상 한국인의 연령에 따른 빛간섭단층촬영혈관조영술을 이용한 망막중심오목무혈관부위 혈관 분석 |
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노동현⋅류가형⋅사공민 |
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영남대학교 의과대학 안과학교실 |
Correspondence:
Min Sagong,
Email: msagong@ynu.ac.kr
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Received: 26 July 2017 • Revised: 16 August 2017 • Accepted: 5 September 2017 |
| Abstract |
PURPOSE
To evaluate foveal avascular zone (FAZ) microvascular structural changes in healthy Korean subjects stratified by age using optical coherence tomography angiography (OCTA). METHODS: Eighty eyes of 43 healthy volunteer subjects who had 20/20 or better best corrected visual acuity without other ocular or systemic disease except vitreous floaters and dry eye syndrome were enrolled and stratified by age group. To measure FAZ size and vascular density (VD) of the superficial capillary plexus (SCP) and deep capillary plexus (DCP), OCTA (DRI OCT Triton, Swept Source OCT, Topcon, Tokyo, Japan) scans were performed over fovea-centered 3 × 3 mm² regions, and then compared with central macular thickness (CMT) and subfoveal choroidal thickness. RESULTS: Mean age of the participants was 46.4 ± 16.1 (20–78). The SCP and DCP FAZ sizes were 0.32 ± 0.11 mm² and 0.41 ± 0.14 mm², respectively. There was a significant difference by age group (p < 0.001, p < 0.001), respectively. The FAZ VD for SCP and DCP was 28.96 ± 3.05% and 33.15 ± 3.64%, respectively. There was no difference between age groups (p = 0.118, p = 0.637). Univariate and multiple linear regression analysis showed that the FAZ size of SCP and DCP was significantly correlated with age (p = 0.039, p = 0.002) and CMT (p = 0.007, p = 0.013), respectively. The SCP and DCP FAZ size were positively correlated with age (R² = 0.279, p < 0.001, R² = 0.344, p < 0.001), and negatively correlated with CMT (R2 = 0.354, p < 0.001, R2 = 0.285, p < 0.001), respectively. CONCLUSIONS: The FAZ size of SCP and DCP increased with age and were negatively correlated with CMT. These results suggest that consideration of age and CMT is important when performing the clinical evaluation of FAZ size in healthy subjects. |
| Key Words:
Age;Foveal avascular zone;Healthy subjects;Optical coherence tomography angiography;Vascular density |
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