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CT in the optic nerve head region. (A) Mean CT map derived from a 6 × 6 mm area, centered on the ONH, generated from 13 eyes (left border: temporal aspect of macula; right border: nasal aspect of macula). (B) Consistent relationship with distance from the ONH, peaking at an approximate distance of 5 to 6 mm from the ONH center, and decreasing more peripherally.
