Main eyes

Definition

The primary, usually larger, set of eyes found on arachnids such as spiders, used for detailed vision and detecting movement.

Etymology

From Old English 'mǣne' meaning 'primary' or 'chief', and 'ēage' meaning 'eye'.

Example

The jumping spider relies heavily on its main eyes to accurately judge distances when leaping towards prey.

Synonyms

• Principal eyes

Related Terms

• Secondary eyes
• Ocelli
• Vision
• Arachnids

Usage Notes

Main eyes are distinct from secondary eyes in both structure and function, often exhibiting better resolution and color detection.