The short-term effects of blood donation on the ocular parameters including blood flow of the retina and choroid in healthy people using OCT- angiography.

We thought the reason might be that, although the SBP showed a trend of reduction at 30 min and 24 h, it might had a transient increase as the blood loss might trigger the transient stress response, this hypothetical transient SBP increase might reduce the reduction of IOP, thus the IOP reduction at 24 h was negatively correlated with SBP changes.

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