Vision is among the five senses that allow people to perceive and interpret the environment. This sense involves a complex process enabled by various physiological mechanisms. At the outset, it is necessary to outline the anatomy of the eye.
This organ consists of the cornea (outer layer), iris (a colored part), pupil (a black center letting light in), lens (focuses light), retina (inner layer with cells), and fovea (small spot for sharp vision) (Oregon State University, n.d.). Specific cells enable vision: rods detect low light and motion, while cones detect bright light, color, and detail (Oregon State University, n.d.). When light enters the eye, it travels to the optic nerve, is converted to energy, and reaches the brain, where it is processed (De Nava et al., 2023). This complicated system ensures that people can see the world.
An emergency under analysis is a mall fire at night and the subsequent evacuation. When this crisis occurs, the light is typically off, and the entire darkness arrives. Under such conditions, people cannot see anything, but this fact is not a problem for people with vision loss.
These individuals usually have enhanced skills in navigating their surroundings by relying on alternative methods. Touch and hearing cues would allow these people to escape the mall safely. Hearing loss is dangerous because complete darkness means that such people are deprived of two senses, which makes navigating more challenging. As for smell loss, this condition means a person cannot detect smoke or other scents to identify an emergency early.
However, one should remember that the scenario provides people with vision loss with a few disadvantages. They require external assistance, while their ability to navigate the building depends on their familiarity with it. That is why it is reasonable to use the other senses to cope with the task. They need to listen for auditory signals to locate the emergency door. The sense of smell will help people find the fire and move away from it.
References
De Nava, A. S. L., Somani, A. N., & Salini, B. (2023). Physiology, vision. StatPearls.
Oregon State University. (n.d.). 15.5 vision.