for seeing
The simple eyes also called ocelli are only used to detect light intensity and not for seeing.
If the insect in question has both complex eyes and simple eyes. the simple eyes are for close range vision while the complex eyes are primarily for longer range vision. If the insect has no complex eyes, then their simple eyes are used best they can for all around vision.
There are many different things that could be considered a simple eye. Many insects for example have simple eyes because they serve one purpose.
Compound eyes detect motion, and simple eyes detect light. or The compound eyes are used to "see". The simple eyes are used to detect light intensity.
Earthworms do not have true eyes like those found in many other animals. Instead, they possess light-sensitive cells located in their skin that allow them to detect light and dark, helping them navigate their environment. This sensory capability serves a similar purpose to simple eyes but is not classified as having either simple or compound eyes.
2 simple eyes.
Grasshoppers have TWO COMPOUND EYES AND THREE SIMPLE EYES.
Locust do not have simple eyes. They have compound eyes that allow them to look in different directions at once.
Blinking eyes are a simple motor tic
simple eyes
A wasp has three simple eyes -- called ocelli -- on the top of its head. These are in addition to the two compound eyes.the compound eyes are the wasp's organs of vision; the ocelli don't form images and help the insect orient while in flight.
Simple and Complex eyes