One that sells lenses, eyeglasses, and other optical instruments.
眼镜商，光学仪器商出售光学仪器、眼镜或其它光学仪器的人
Microscopes and telescopes are optical instruments.
望远镜和显微镜是光学仪器。
An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.
