What is the term used for vision loss in half of the visual field?

The term "homonymous hemianopsia" refers specifically to vision loss that occurs in the same half of the visual field in both eyes. This condition is often the result of damage to the brain, particularly in the occipital lobe or in the pathways that process visual information. For instance, if a person experiences right homonymous hemianopsia, they would lose vision on the right side of both eyes, affecting their ability to see items located in that visual field.

Understanding the key features of this condition is crucial for stroke rehabilitation, as it can significantly impact a patient's ability to perform daily activities and navigate their environment. Effective rehabilitation strategies may include visual scanning techniques and compensatory strategies to help individuals adapt to their visual field loss.

The other terms provided relate to different aspects of visual disturbances. Heteronymous hemianopsia refers to loss of vision in different visual fields in each eye, while quadrantopsia indicates loss in a quarter of the visual field. Agnosia, on the other hand, is a condition that affects recognition or understanding of stimuli rather than specific visual field loss. Thus, recognizing “homonymous hemianopsia” as the correct terminology is essential in the context of stroke rehabilitation and its associated visual deficits.