FTBUT
Fluorescein tear break-up time records the interval from the last blink to first significant tear-film disruption.
Corneal fluorescein staining
Documents punctate, inferior, interpalpebral, focal or geographic epithelial staining patterns.
FDDT / TCA
Tracks fluorescein intensity over time to support tear-clearance and dye-disappearance assessment.
Lissamine green
Documents devitalised or mucin-deficient ocular-surface areas, especially conjunctival staining.
Rose bengal
Documents ocular-surface staining patterns where rose bengal is clinically indicated.