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

Table 2

Central corneal thickness measured with 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	509.3±25.7; (494–539)	453.3±23.6; (435–480)	0.100
After epithelial removal	452.0±53.0; (394–498)	426.0±34.2; (390–458)
After 30 minutes of riboflavin	315.7±20.2; (303–339)	369.3±36.3; (328–396)
Total percentage of reduction	38±6%	18±9%	0.100

CCT: central corneal thickness; USP: ultrasound pachymetry; SDOCT: spectral-domain OCT.
Values in microns are presented as mean ± standard deviation (range if available).