| 
      POAG= primary open angle glaucoma, OA= ophthalmic artery, CRA= central
    retinal artery, SPCA= short posterior ciliary artery, PSV= peak systolic velocity,
    EDV= end-diastolic velocity, RI= resistive index *P < 0.05
        | Parameters | POAG ( n = 65) |  
        | Latency time (r value) | P  | Amplitude (r value) | P  |  
        | Central    retinal artery |   |   |   |   |  
        | PSV | −0.068 | 0.479 | 0.210 | 0.340 |  
        | EDV | −0.100 | 0.458 | 0.232 | 0.164 |  
        | RI | 0.165 | 0.331 | −0.360 | 0.248 |  
        | Ophthalmic    artery |   |   |   |   |  
        | PSV | −0.323 | 0.053 | 0.240 | 0.163 |  
        | EDV | −0.015 | 0.820 | 0.053 | 0.634 |  
        | RI | 0.354* | 0.003 | −0.424* | 0.015 |  
        | Short    posterior ciliary artery |   |   |   |  
        | PSV | −0.248 | 0.164 | 0.051 | 0.656 |  
        | EDV | −0.164 | 0.251 | 0.121 | 0.323 |  
        | RI | 0.324 | 0.053 | 0.016 | 0.527 |  |