What is the condition that describes if the amount of light information transmitted to the brain from one eye differs from that of the other eye?

The condition described in the question refers to a disparity in the amount of light information received by the brain from each eye, which is precisely defined as an afferent pupillary defect. This condition arises when there is a problem with the sensory input from one eye, typically due to a significant issue in the optic nerve or retina, leading to unequal responses in the pupillary reaction to light.

When light is shone in the eye with a defect, the pupil does not constrict as much as the normal eye does, and this can be tested using the swinging flashlight test. Notably, the defect reflects how the brain interprets visual information based on varying levels of illumination detected by each eye.

The other conditions mentioned, such as homonymous hemianopia, visual neglect, and retinal tear, involve different aspects of visual processing and awareness. Homonymous hemianopia refers to the loss of vision in half of the visual field in both eyes and does not deal with differential light perception. Visual neglect involves unawareness of one side of the visual field despite intact vision, without an inherent issue in pupillary response. A retinal tear concerns physical damage to the retina, which may lead to vision loss, but it does not specifically pertain to the differential