1. wearing eyeglasses or spectacles
Usage: informal; often considered dated or mildly derogatory
2. having four eyes or eye-like structures
Usage: technical or descriptive, used in biology or zoology

Examples

• The four-eyed fish can see both above and below the water surface simultaneously.
• He wore thick glasses and was sometimes teased for being four-eyed.
• Some insects have four-eyed vision systems that help them navigate.
• The character in the old comic strip was drawn as a four-eyed nerd.
• Certain crustaceans possess four-eyed sensory organs.