Abstract

Background: The studies on the assessment of Pupil to Limbus Diameter (PLD) ratio correlation with autonomic activity were sparse.

Aims and Objectives: The study correlates the PLD ratio with the autonomic activity in hypertensive patients.

Materials and Methods: One hundred participants both male and female were recruited for the study. The two-box method was used to record the PLD ratio. A digital sphygmomanometer was used to record the autonomic parameters.

Results: PLD ratio of the right eye was having significantly negative correlation with pulse rate. PLD ratio of the right eye was having a significantly positive correlation with systolic blood pressure. PLD ratio of the right eye was having significantly negative correlation with diastolic blood pressure. The PLD ratio of the left eye was having a positive correlation with the pulse rate. However, it was not significantly different. The pupil-to-limbus diameter ratio PLD ratio of the left eye was having significantly positively correlated with blood pressure. The PLD ratio of the left eye positively correlated with diastolic blood pressure. However, it was not statistically significant.

Conclusion: The association between PLD ratio of the right eye and systolic blood pressure was positive correlation. The association between the PLD ratio of the right eye with pulse rate and diastolic blood pressure is negative correlation. There was a positive correlation between systolic blood pressure, diastolic blood pressure, pulse rate, and PLD ratio.

Key words: Pupil to Limbus Diameter; Autonomic Functions; Hypertension