Certified Rehabilitation Registered Nurse (CRRN) Practice Exam

Which condition is characterized by loss of visual fields in the left half of each eye?

1. Significant right sided neglect

2. Left Homonymous hemianopsia

3. Loss of vision in the nasal half of the left eye

4. Spatial perceptual deficits

The correct answer is: Left Homonymous hemianopsia

The correct answer is characterized by loss of visual fields in the left half of each eye, which is known as left homonymous hemianopsia. This condition occurs when there is damage to the visual pathways in the brain, particularly affecting the areas that process visual information from the right visual field. As a result, both the left visual field of each eye is affected, leading to a loss of vision in that area. This phenomenon can occur after neurological incidents such as strokes or traumatic brain injuries, particularly those affecting the right hemisphere of the brain, as that hemisphere processes visual input from the left side of the visual field. Understanding this is crucial for rehabilitation professionals, as it influences the approach to therapy and support for affected individuals. The other conditions mentioned do not describe this specific visual field loss. Significant right-sided neglect refers to the lack of awareness and attention to stimuli on the right side of the body, which is different from a visual field loss. Loss of vision in the nasal half of the left eye would not affect the left visual field in both eyes but rather indicate an issue with a specific part of the left eye's vision. Spatial perceptual deficits pertain to difficulties in understanding spatial relationships and do not specifically refer to the loss of visual fields.