Comments on “Usefulness of the eyeball exposure area as an eye measurement modality through a comparison between eyes with inborn double eyelids and operated double eyelids”

Abstract

We would like to express our appreciation of Dr. Kun Hwang for his thoughtful comments and kind discussion about the different vertical and horizontal ratios of the human cornea [1]. From the frontal view of the eye, it is known that the horizontal distance of the cornea appears slightly wider than the vertical distance. This is because the top and bottom of the anterior cornea are slightly overlapped by the sclera. The resulting difference between the horizontal and vertical diameters of the cornea is about 10%, according to relevant references. Thus, if the measurement was based on a vertical standard, as the commenter pointed out, it would be necessary to adjust the values accordingly; however, in this study, the values were measured based on the horizontal diameter. Nonetheless, in Figure 1, the drawings of the corneal diameter as the reference point were incorrectly marked with vertical distances.