What is the term for the ability to see objects within an area of only twenty degrees or less?

The term for the ability to see objects within an area of only twenty degrees or less is known as tunnel vision. This condition is characterized by a narrow field of vision, which restricts peripheral sight while maintaining some ability to see straight ahead. It can occur due to various factors, including certain eye conditions, neurological disorders, or injuries.

By understanding tunnel vision, it's important to recognize its implications for individuals, as it can significantly impact mobility, awareness of surroundings, and overall quality of life. In clinical settings, knowledge of how tunnel vision affects patients enables music therapists and other professionals to tailor interventions that consider the visual limitations of their clients.

Residual vision refers to any remaining vision following the loss of most visual acuity, while poor central vision involves a decrease in the ability to see straight ahead, which can coexist with broader vision issues. Visual efficiency describes how well an individual can use their vision to perform tasks but is not specifically linked to a narrow visual field. These distinctions help clarify the specific nature of tunnel vision compared to other visual impairments.