Which term describes insect eyes that are made up of many small visual units?

Which term describes insect eyes that are made up of many small visual units?

• A. Monocular eyes
• B. Compound eyes
• C. Ocelli
• D. Pinhole eyes

Answer: (B)

Compound eyes are insect eyes built from many tiny visual units called ommatidia. Each ommatidium has its own corneal lens and photoreceptor cells, so the brain receives a mosaic set of signals from throughout the eye. This arrangement gives a wide field of view and excellent motion detection, which helps insects track movement and navigate their surroundings, even though the overall image resolution is typically lower than that of a single-lens eye. The other terms refer to simpler eye types: monocular (single-lens) eyes, ocelli (small simple eyes that detect light intensity but not detailed images), and pinhole eyes (another simple image-forming type).