Final answer:
Tyrahn's difficulty in seeing in dim light is called night blindness. This occurs when the rods, responsible for vision in low light, do not efficiently transform light into nerve impulses. Rods are highly sensitive to light and are used in peripheral and nighttime vision. The correct answer is option D .
Step-by-step explanation:
Tyrahn's difficulty in seeing in dim light is called night blindness. Night blindness occurs when the rods, which are responsible for vision in low light conditions, do not efficiently transform light into nerve impulses. This results in decreased visual sensitivity and difficulty seeing in dimly lit environments.
Rods are a type of photoreceptor located in the outer edges of the retina. They are highly sensitive to light and are used in peripheral and nighttime vision. Unlike cones, which are responsible for color vision, rods do not yield color information. Rods are so sensitive to light that a single photon can result in an action potential from a rod's corresponding retinal ganglion cell (RGC).
When entering a dark environment, rod activity dominates and is responsible for allowing us to see. However, if the rods do not efficiently transform light into nerve impulses, as is the case with night blindness, the individual will have difficulty seeing in dim light.