Trivia Questions With Answers!

Eye Trivia Quiz Questions

Trivia quiz questions with answers about Eyes

What is an eye?
A: Eyes are organs of the visual system.

Complex eyes can distinguish what?
A: Shapes and colors.

The visual fields of many organisms, especially predators, involve large areas of binocular vision to do what?
A: To improve depth perception.

In other organisms, eyes are located to maximize what?
A: The field of view, such as in rabbits and horses, which have monocular vision.

The first proto eyes evolved among animals how long ago?
A: 600 million years ago.


In most vertebrates and some mollusks, the eye works by allowing light to enter and project onto a what?
A: A light-sensitive layer of cells at the end of the eye, known as the retina.

The cone cells (for color) and the rod cells (for low-light contrasts) in the retina detect and convert light into what?
A: Into neural signals for vision.

The visual signals are then transmitted to the brain via what?
A: The optic nerve.

Such eyes are typically roughly spherical, filled with what?
A: A transparent gel-like substance called the vitreous humor, with a focusing lens and often an iris.

What does the relaxing or tightening of the muscles around the iris do?
A: It changes the size of the pupil, thereby regulating the amount of light that enters the eye.


The eyes of most cephalopods, fish, amphibians, and snakes have fixed what?
A: Lens shapes, and focusing vision is achieved by telescoping the lens—similar to how a camera focuses.

Compound eyes are found among what?
A: Arthropods.

Compound eyes are composed of what?
A: Many simple facets.

Each sensor has its own lens and what?
A: Photosensitive cell(s).

Some eyes have up to how many such sensors?
A: 28,000.


Compound eyes are very sensitive to what?
A: Motion.

Some arthropods, including many Strepsiptera, have compound eyes of only a few facets, each with what?
A: A retina capable of creating an image, creating vision.

With each eye viewing a different thing, a fused image from all the eyes is produced in the brain, providing very different what?
A: High-resolution images.

Mantis shrimp has been reported to have the world's most complex what?
A: Color vision system.

Trilobites, which are now extinct, had unique what?
A: Compound eyes.


What did they use to form the lenses of their eyes?
A: Clear calcite crystals.

In this, they differ from most other arthropods, which have what?
A: Soft eyes.

In contrast to compound eyes, simple eyes are those that have what?
A: A single lens.

Jumping spiders have a large pair of simple eyes with a narrow field of view, supported by an array of other, smaller eyes for what?
A: Peripheral vision.

Some insect larvae, like caterpillars, have a different type of simple eye (stemmata) which usually provides only a what?
A: A rough image.

In organisms dwelling near deep-sea vents, compound eyes have been secondarily simplified and adapted to see what?
A: The infra-red light produced by the hot vents—in this way the bearers can avoid being boiled alive.

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