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Bar graphs showing subbasal corneal nerve alterations in affected and clinically unaffected eyes in herpes zoster ophthalmicus (HZO) patients and according to grade of hypoesthesia and in the control group: (A) total nerve length, (B) total number of nerves, (C) main nerve trunks, and (D) nerve branches. Error bars represents standard deviation from the mean. *P<0.05, **P<0.001, and ***P<0.0001 compared with control group by analysis of variance.
