From: Ocular perfusion pressure and ophthalmic artery flow in patients with normal tension glaucoma
Mild | Moderate | Severe | P value | |
---|---|---|---|---|
(MD < -6 dB) | (MD -6 to -12 dB) | (MD > -12 dB) | ||
n | 16 (51.6 %) | 8 (25.8 %) | 7 (22.6 %) | |
Mean Deviation, MD (dB) | -3.00 +/- 1.55 | -8.59 +/- 2.20 | -17.96 +/- 5.42 | <0.001 |
Cup:Disc Ratio, CDR | 0.69 +/- 0.11 | 0.75 +/- 0.09 | 0.80 +/- 0.08 | 0.076 |
Duration (years) | 5.2 +/- 3.5 | 3.7 +/- 2.1 | 4.2 +/- 1.0 | 0.486 |
Number of medications (units) | 1.3 +/- 0.4 | 1.6 +/- 0.5 | 1.9 +/- 0.9 | 0.072 |
Ocular Perfusion Pressure, OPP (mmHg) | 66.00 +/- 10.78 | 59.06 +/- 7.42 | 57.29 +/- 6.62 | 0.096 |
Mean Flow Velocity, MFV (cm/s) | 17.43 +/- 2.00 | 17.06 +/- 4.01 | 16.33 +/- 3.49 | 0.828 |
Peak Systolic Velocity, PSV (cm/s) | 32.23 +/- 6.91 | 36.07 +/- 10.74 | 37.84 +/- 6.79 | 0.471 |
End Diastolic Velocity, EDV (cm/s) | 10.03 +/- 1.32 | 7.55 +/- 3.57 | 5.57 +/- 2.94 | 0.027* |
Resistive Index, RI | 0.70 +/- 0.10 | 0.78 +/- 0.12 | 0.83 +/- 0.06 | 0.064 |