Intraoperative Pachymetry Using Spectral-Domain Optical Coherence Tomography during Accelerated Corneal Collagen Crosslinking

Table 3

Thinnest corneal thickness measured by spectral-domain optical coherence tomography between eyes with and without lid speculum.

	With lid speculum; (range) (microns)	Without lid speculum; (range) (microns)	𝑃 value
Baseline	445.7±41.2; (400–480)	410.7±13.6; (395–418)	0.236
After epithelial removal	393.0±32.7; (368–430)	368.7±20.2; (356–392)
After 30 minutes of riboflavin	267.7±26.5; (249–298)	302.0±33.8; (282–341)
Total percentage of reduction	40±5%	26±7%	0.100

TCT: thinnest corneal thickness; USP: ultrasound pachymetry; SDOCT: spectral-domain optical coherence tomography.