Certified Ophthalmic Medical Technologist (COMT) Practice Exam

What is referred to when there are no deviations in the expected height and shape of the island of vision in visual field testing?

1. Normal visual field

2. Abnormal visual field

3. Marginal visual field

4. Depressed visual field

The correct answer is: Normal visual field

The term indicating that there are no deviations in the expected height and shape of the island of vision during visual field testing is indeed associated with a normal visual field. In this context, a normal visual field means that the individual's peripheral and central vision falls within the standard limits for visual sensitivity and the expected topography of vision, suggesting no significant visual field loss or defect. This indicates that the optic pathways, as well as the visual processing centers in the brain, are functioning properly, allowing for a complete and unobstructed view as tested through appropriate visual field examination techniques. In contrast, other terms imply the presence of visual field deficits or abnormalities. For instance, an abnormal visual field would indicate the presence of irregularities or losses in vision, such as scotomas or constrictions. A marginal visual field refers to borderline findings that might not fit clear classifications, while a depressed visual field indicates a reduction in sensitivity across the visual field, often associated with conditions like glaucoma or neurological issues. Thus, the context of a normal visual field highlights the absence of these deviations, affirming the integrity of the visual system.