A simple eye (sometimes called a pigment pit) refers to a type of eye form or optical arrangement that contains a single lens. A "simple eye" is so called in distinction from a multi-lensed "compound eye", and is not necessarily at all simple in the usual sense of the word. The eyes of humans and large animals, and camera lenses are classed as "simple" because in both cases a single lens collects and focuses light onto the retina or film. Many insects have compound eyes consisting of multiple lenses (up to tens of thousands), each focusing light onto a small number of retinula cells.
The structure of an animal's eye is determined by the environment in which it lives, and the behavioural tasks it must fulfill to survive. Arthropods differ widely in the habitats in which they live, as well as their visual requirements for finding food or conspecifics, and avoiding predators. Consequently, an enormous variety of eye designs are found in arthropods: they possess a wide variety of novel solutions to overcome visual problems or limitations.
There's a house down on the corner
That we always used to talk about
Never had the guts to go inside
Not even on a dare
Boarded up and creepy
Scary eyes looked out upon a sleepy town
Fascination kept us guessin'
Why the sign read to beware?
We always knew just
What would hit the fan
If we got an up close look
At the boogie man
Shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Zavelow, Zavelow, Zavelow, yo
I could look inside the window
If I jumped upon my trampoline
Could've sworn I saw Hannibal Lichter
With a hatchet and a head
Not the kind of place you'd see
In Better Homes and Gardens magazine
Unless they did an expose
On the night of the living dead
But with a pretty girl
To hold my hand
Could've got an up close look
At the boogie man
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Oh, Zavelow, woah
But with a pretty girl
To hold my hand
Could've got an up close look
At the boogie man
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
Yeah, shadows on the wall
Voices in the hall, oh, yeah
There's more than just a mouse
In the Zavelow House
(Zavelow, Zavelow, Zavelow)