Illinois Vision Certification Practice Test

What does the term tropia indicate?

1. Manifest deviation of the eye

2. Latent deviation of the eye

3. Visual field loss

4. Color blindness

The correct answer is: Manifest deviation of the eye

The term tropia refers to a manifest deviation of the eye, meaning that it involves a noticeable misalignment when the eyes are both open and attempting to focus on an object. This condition indicates that one eye may be turned inward, outward, upward, or downward, which can affect binocular vision and depth perception. Tropia can be evident in various forms, including strabismus, where the eyes do not properly align with each other. Understanding tropia is essential in fields such as optometry and ophthalmology because it directly impacts visual function and may require medical intervention. In contrast, latent deviation, visual field loss, and color blindness refer to different conditions and are not what the term tropia signifies. Latent deviations, for example, may only become apparent when one eye is covered, unlike tropia, which is visible with both eyes open.