Visual field defects refer to a loss of vision in a specific area of the visual field, which can affect one or both eyes. These defects can result from various conditions, including glaucoma, stroke, or retinal detachment. Individuals may experience blind spots or reduced vision in certain directions, impacting their ability to see objects clearly. Diagnosis typically involves a visual field test, where a patient looks at a central point and indicates when they see lights or objects in their peripheral vision. Treatment options depend on the underlying cause and may include medications, surgery, or vision rehabilitation to help manage the condition.