Figure 4. The venules oxygen saturation (%) in ischemic and non-ischemic BRVO group.

A: SaO₂-V in occluded vessels is fluctuant (range 51.4%-71.2%), a little higher than unaffected vessels in ischemic BRVO eye (though no significant difference), also comparable to correspond quadrant in contralateral eye; B: SaO₂-V in occluded vessels is rather more fluctuant (range 43%-72%) in non-ischemic BRVO eye, higher than unaffected eye, also comparable to contralateral eye. The lines connect measurements on the same patients. Measurements, which may be affected by several confounding factors, have been excluded.