Table 1.

Conjunctival Inflammation Grading System for In Vivo Confocal Microscopy

Feature	Grading Description
Inflammatory infiltrate	Mean inflammatory cell density of 3 randomly selected volume scans⁎
DCs	Present or absent: to be present, the mean number of DCs per volume scan needs to be ≥1†
Tissue edema	Present or absent: present if seen in any volume scan
Papillae	Present or absent: present if seen in any volume scan

DC = dendritiform cells.

^⁎Cell density is measured with the RCM software, for which it is suggested that a minimum of 50 cells is counted per field. See text for explanation of why 3 scans are selected. The individual scan with the largest density of cells from within the volume scan is used to calculate the density.

^†The largest number of DCs in any individual scan in a particular volume scan is used.