How does pupil size affect the amount of light reaching the retina?

The pupillary light reflex constricts the pupil in response to light, and pupillary constriction is achieved through the innervation of the iris sphincter ... Pupil dilation is when the black part of your eye, called the pupil, gets larger. This happens to let more light into your eye, which can help you see ... Feb 4, 2025 ... Marcus Gunn pupil refers to the unequal pupillary response to light due to damage or disease in the retina or optic nerve. Examples include ... The Government believes that the Pupil Premium, which is additional to main school funding, is the best way to address the current underlying inequalities ... Jan 9, 2010 ... rjlittlefield wrote: Pupil ratio, also called "pupillary magnification factor" or just "pupil factor", is the ratio of diameters between the ... 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. Anisocoria. Enlargement of one pupil; Pupils of different size; Eyes/pupils different size. Anisocoria is unequal pupil size. The pupil is the black part in ... Apr 4, 2023 ... What is the pupil premium? The pupil premium is extra money for schools to help disadvantaged pupils of all abilities achieve their full ... May 19, 2022 ... It's easy to measure PD online — all you need is a mirror and our printable ruler, available to download below. You can also measure friends' ... PUPIL, an advanced digital twin that models the interaction between track and train, to demonstrably deliver improved track availability.