Evaluation of the Lower Punctum Parameters and Morphology Using Spectral Domain Anterior Segment Optical Coherence Tomography

Figure 1

Image acquisition using crossline centered at the lower punctum (upper left); the vertical line scan explores the depth of the punctum and scans the junction between the punctum and vertical canaliculus (right) while the horizontal line scan demonstrates the extent of the punctum and can measure the outer diameter (bottom left).