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. 2025 Jan 10;20(1):e0315712. doi: 10.1371/journal.pone.0315712

Fig 2. Correlation of pupil diameter after direct light stimulus as measured by UP and IVP.

Fig 2

a) ON+ eyes Black line = regression line, grey area = 95% confidence interval, IVP = infrared video pupillometry, ON+ eyes = eyes with optic neuritis, PD = pupil diameter in millimeters, r = correlation coefficient of PD at rest in IVP and UP, UP = ultrasound pupillometry, 95%CI = 95% confidence interval. Individuals are represented by different colors; two dots of the same color represent both ON+ eyes (right and left) of one individual. b) HC eyes Black line = regression line, grey area = 95% confidence interval, HC = healthy controls, IVP = infrared video pupillometry, PD = pupil diameter in millimeters, r = correlation coefficient of PD at rest in IVP and UP, UP = ultrasound pupillometry, 95% CI = 95% confidence interval. Individuals are represented by different colors; two dots of the same color represent both ON+ eyes (right and left) of one individual.