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Fig. 1 | BMC Ophthalmology

Fig. 1

From: Estimation of axial curvature of anterior sclera: correlation between axial length and anterior scleral curvature as affected by angle kappa

Fig. 1

Concept of the axial radius of curvature (ARC) of the anterior sclera. The ARC of a certain ocular surface point is calculated on the basis of the following concept: for an ocular surface point (P) where the distance from the axis line is d (distance of PP’), a line can be drawn that passes point P and is perpendicular to the line tangential to the ocular surface at point P. Point A is the point where the perpendicular line meets the axis line. The distance of PA is ARC(d). If point P is temporal to the axis line, it will be designated as tARC(d). If the point is nasal to the axis line, it will be designated as nARC(d). The axis line is defined as a bright vertical flare line that passes the corneal apex and is parallel to the visual axis

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BMC Ophthalmology

ISSN: 1471-2415

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