The slit lamp, or biomicroscope, is probably the single most important objective instrument in contact lens practice, allowing detailed examination of the anterior segment of the eye. Slit-lamp examination is an essential aspect of pre-assessment of the potential contact lens wearer (neophyte) and in the aftercare of the existing wearer.

Key Points

• A slit-lamp with a good range of magnification and excellent optics is essential for contact lens practice
• Establishing a routine aids a thorough and comprehensive examination of all ocular tissue
• Use of a fluorescin is essential to examine ocular integrity. An additional barrier filter will enhance observation
• Adapting a grading system is essential for accurate and comprehensive records