![]() The IPD measurements by Contact digital pupillometer and Non-Contact digital IPD measuring devices showed an insignificant difference both for monocular and binocular IPDs and also had a good agreement between the methods. The mean age ± standard deviation (SD) for the study subjects were 53.35 ± 11.91 (range 32-81) years. Results: A total of fifty subjects IPD data were analysed (male 62.0%). Agreement was assessed using Spearman correlation and Bland-Altman plots. Gender effects were assessed using Wilcoxon and Mann-Whitney tests respectively. Methods: Monocular and binocular distance and near IPD were measured using contact (Essilor pupillometer Pupillon, Essilor, France) and non-contact (OptikamPad Optikam Tech Inc., Canada) measuring device. This study aims to report the agreement between contact and non-contact IPD measurements. Hence, we need an alternate method which allows to measure IPD at 1-meter distance. This protocol was a major limitation while measuring the IPD during spectacle dispensing. Social distancing is one of the protocols which is being followed since COVID-19 pandemic across the globe. Purpose: Interpupillary distance (IPD) measurement is important in various sub-fields in ophthalmology and vision sciences. Both methods had good inter-session repeatability. Male binocular IPD was approximately 2 mm wider than the female IPD. Distance binocular IPD was approximately 3 mm wider than near IPD. There was no significant difference between the session for both methods.īinocular and monocular manual and automatic measurements were significantly different statistically, but not clinically. automatic measurements were significantly different for all conditions (md: <1 mm for all) except for distance left eye male PD. Males and females significantly differed in age (<2 year mean difference (md)) and IPD (monocular md: < 1 mm, binocular md: < 2 mm). The agreement study included 199 participants (mean age: 24.1 ± 5.0 range: 19−53, 58 male, 141 female) and the repeatability sub- study included 30 (mean age: 27.9 ± 4.5, range: 23–39, 6 male, 24 female). Thirty additional participants were tested within 1–2 weeks to determine the inter-session repeatability. Agreement was assessed using Spearman correlation and Bland-Altman (B&A) plots. Gender effects were assessed using Wilcoxon and Mann-Whitney tests, respectively. Monocular distance from the bridge of the nose and binocular distance and near binocular IPD were randomly measured, using a millimeter ruler and the Essilor Pupillon pupillometer. Therefore, there is importance in the agreement and inter-session repeatability of manual and automatic IPD measurements. IPD frequently is measured on different days, and by either automatic pupillometers (physiological measurement) or manual ruler (anatomical measurement). Interpupillary distance (IPD) is important in developmental anatomy, genetics, design of optical instrumentation, ocular diagnostics, and optical prescribing. ![]()
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March 2023
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