Figure 4From: Longitudinal stability of the diurnal rhythm of intraocular pressure in subjects with healthy eyes, ocular hypertension and pigment dispersion syndrome Clock plot of the long-term mean acrophases of subjects with PDS. Subjects with PDS (red) show a significant phase lag compared to normal subjects (blue; p < 0.05). Only the 19 subjects who had a significant Rayleigh test were included.Back to article page