Ocular biometric characteristics during the menstrual cycle

Figures & data

Table 1 The mean age and ocular biometric parameters

	Mean ± SD	Minimum–maximum
Age (years)	22.86±4.22	19–36
AL (mm)	23.47±0.88	21.15–24.81
CCT (µm)	528.85±37.85	452.33–589.67
ACD (mm)	3.60±0.29	3.01–4.09
LT (mm)	3.47±0.18	3.16–3.76
K1 (diopter)	43.82±1.65	41.56–46.48
K2 (diopter)	42.84±1.38	40.18–45.10

Abbreviations: ACD, anterior chamber depth; AL, axial length; CCT, central corneal thickness; LT, lens thickness; K1, steep keratometry readings; K2, flat keratometry readings; SD, standard deviation.

Table 2 Measurements were made on three different menstrual cycle days for 1 month

	Menstrual mean ± SD	Ovulatory mean ± SD	Luteal mean ± SD	P-value
AL (mm)	23.46±0.89	23.47±0.88	23.48±0.87	0.421
CCT (µm)	528.1±38.18	528.64±37.88	529.82±38.12	0.498
ACD (mm)	3.07±0.27	3.08±0.33	3.07±0.29	0.866
LT (mm)	3.49±0.19	3.47±0.19	3.44±0.21	0.179
K1 (diopter)	43.84±1.66	43.83±1.65	43.82±1.67	0.892
K2 (diopter)	42.86±1.36	42.85±1.40	42.82±1.40	0.434

Abbreviations: ACD, anterior chamber depth; AL, axial length; CCT, central corneal thickness; LT, lens thickness; K1, steep keratometry readings; K2, flat keratometry readings.