What is the pupillary light reflex?

Apr 23, 2025 ... 1. a child or young person in school or in the charge of a tutor or instructor : student 2. one who has been taught or influenced by a famous or distinguished ... What is PD? Your Pupillary Distance, or PD, is the distance in millimeters (mm) between the center of one pupil to the center of the other. A personalized fit ... PUPIL, an advanced digital twin that models the interaction between track and train, to demonstrably deliver improved track availability. The pupil is the circular opening that allows light to enter the eye. It is found at the center of an eye structure called the iris. Dec 26, 2023 ... School districts determine which staff members need to have a permit. Those who wish to apply for a pupil-activity permit must complete the ... How do I measure PD? · Grab a ruler that has measurements in millimeters. · Close your right eye and align the ruler's zero to the center of your left pupil. Jan 9, 2025 ... Expenditures Per-Pupil (EPP) vs. Expenditures Per Equivalent Pupil (EPEP) · Disability Category 1 weight: 0.2906 · Disability Category 2 weight: ... The pupil eye function allows the right amount of light that should enter the eye. When the light gets dim, the pupil enlarges (dilates) so that more light can ... It is a unique optical design system that takes into account the natural pupil variation that occurs both across the refractive error range and as patients age. Mar 25, 2020 ... Pupil dilation can happen for many reasons. In some cases, dilation wears off on its own. In others, pupil dilation may indicate a serious and immediate ...