血流通过任何组织,都是依赖于该组织的灌注压、血管阻力以及血液的粘性,眼球内的血流状态更不例外。更具体一点说,可以认为,眼内血管床的血流(F)与进入眼内的动脉压(Pa)及离开眼球的静脉压(Pv)间的压力梯度成正比,而与血管阻力(R)成反比,即F=(Pa-Pv)/R。按照Poiseuille定律,血流的阻力(R),与血液粘性(y)、血管长度(1)成正比,而与血管半径(r)的4次方成反比,即R=8/π×y×1/r~4。通常 Blood flow through any tissue, are dependent on the organization’s perfusion pressure, vascular resistance and blood viscosity, the eye’s blood flow state is no exception. More specifically, it is believed that the blood pressure (F) in the ocular vascular bed is proportional to the pressure gradient between the arterial pressure (Pa) entering the eye and the venous pressure (Pv) leaving the eyeball, but not to the vascular resistance ) Is inversely proportional to, that is F = (Pa-Pv) / R. According to Poiseuille’s law, blood flow resistance (R) is proportional to blood viscosity (y), blood vessel length (1) and inversely proportional to the fourth power of the blood vessel radius (r), ie R = 8 / 1 / r ~ 4. usually