An OGLER, a gazer, an EYER, and a GAPER are all terms used to describe someone who stares. An OGLER is someone who stares in an intrusive or inappropriate manner, often with sexual intent. A gazer is someone who stares intently at something, usually for a long period of time. An EYER is someone who looks at something with great attention and interest. Finally, a GAPER is someone who stares in a wide-eyed, open-mouthed manner, usually in surprise or amazement.