Table 1.

Diurnal variation in various ocular and systemic parameters across various time frames from 9 am to 5 pm

Variables	9 am	11 am	1 pm	3 pm	5 pm	P
IOP (mmHg)	14±2.83	13.83±2.89	13±3.13	13.08±3.39	13.5±3.08	0.38
Axial length (mm)	23.42±0.91	23.43±0.91	23.45±0.91	23.43±0.91	23.44±0.90	0.18
SFCT (μm)	360.33±83.05	358.25±91.90	357.91±89.37	350.25±91.51	352.58±88.72	0.41
Macular CVI	0.42±0.03	0.42±0.04	0.42±0.02	0.42±0.03	0.41±0.03	0.43
Peripapillary CVI
Nasal	0.49±0.04	0.48±0.03	0.49±0.02	0.49±0.02	0.49±0.02	0.83
Temporal	0.42±0.02	0.44±0.02	0.43±0.02	0.44±0.02	0.44±0.02	0.02*
Superior	0.45±0.03	0.44±0.02	0.45±0.02	0.45±0.03	0.45±0.03	0.59
Inferior	0.45±0.03	0.45±0.04	0.45±0.04	0.45±0.03	0.45±0.02	0.99
CMT (μm)	214.83±12.44	217.25±10.39	216.33±11.44	214.33±12.16	213.5±11.72	0.21
Pulse (per min)	84.58±7.12	86.41±11.79	79.33±8.55	88.83±10.17	90.83±11.21	0.02
SBP (mmHg)	111.83±14.31	109.33±11.01	115.33±25.34	111.42±14.53	112.82±15.01	0.68
DBP (mmHg)	74.67±10.44	72.67±7.95	78.25±12.31	75.42±11.49	74.08±11.06	0.46
MAP (mmHg)	87.06±11.47	84.89±8.41	90.61±16.02	87.42±12.21	87.0±10.31	0.48
MOPP (mmHg)	48.95±6.69	47.61±4.72	51.99±9.98	49.8±7.63	49.25±6.46	0.36

IOP=Intraocular pressure, SFCT=Subfoveal choroidal thickness, CVI=Choroidal vascularity index, CMT=Central macular thickness, SBP=Systolic blood pressure, DBP=Diastolic blood pressure, MAP=Mean arterial pressure, MOPP=Mean ocular perfusion pressure. *Significant P values are highlighted