Seasonal variation of choroidal thickness and circulation in young, healthy participants.

Blood pressure (BP) and intraocular pressure (IOP) show seasonal variations. In this prospective study, we measured the IOP, BP, SCT and choroidal blood flow velocity of the right eye of 50 young, healthy volunteers (17 men and 33 women; mean age, 20.7 ± 4.5 years). In healthy participants, systolic BP (SBP), diastolic BP (DBP), MBP, OPP and MBR were significantly higher in winter than in summer. [Extracted from the article]