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, or frontal structures and posterior segment of the eye. The binocular slit-lamp examination provides a stereoscopic magnified view of the eye structures enabling anatomical diagnoses to be made for a variety of eye conditions. This book is a concise guide to slit-lamp biomicroscopy for trainees. Beginning with an overview of the technique, the following chapters provide in depth discussion on the slit-lamp biomicroscope, its magnification ranges, patient positioning and illumination techniques. The final section covers its clinical application as a diagnostic tool for both anterior and posterior segment conditions of the eye. Presented in a step by step format, each method is described beginning with its background, then application, grading of abnormality and interpretation.