Nearly all benchtop studies of corneal biomechanics have relied on protocols which stiffen the cornea, such as riboflavin-UV crosslinking, as a way of providing contrast and validation of biomechanical measurements. However, there are strong clinical motivations to detect softening of the cornea. In this work, we present the evidence that phase-decorrelation OCT (PhD-OCT) is able to detect a small degree of corneal softening due to enzymatic digestion. This benchtop study supports the idea that PhD-OCT may detect keratoconus and early ectasia clinically.
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