裂隙灯，也被称为裂隙灯显微镜，是一种用于眼科检查的光学仪器。

裂隙灯最早的概念可以追溯到1911年，归功于 Alvar Gullstrand 和他的文章 “large reflection-free ophthalmoscope.”。当时的仪器由蔡司公司研制。

The slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye. It is used in conjunction with a biomicroscope. The lamp facilitates an examination of the anterior segment and posterior segment of the human eye, which includes the eyelid, sclera, conjunctiva, iris, natural crystalline lens, and cornea. The binocular slit-lamp examination provides a stereoscopic magnified view of the eye structures in detail, enabling anatomical diagnoses to be made for a variety of eye conditions. A second, hand-held lens is used to examine the retina.