Table 7 Clinical interpretation of astigmatism vector descriptive statistics.
From: Association of nutritional intake with myopia and astigmatism
Parameter | Value | Clinical interpretation |
|---|---|---|
J0 (Orthogonal) | Quantifies with-the-rule (WTR) vs. against-the-rule (ATR) astigmatism | |
Mean = −0.028 D | Negative | Predominant against-the-rule astigmatism (steep meridian near horizontal/180°) |
SD = 0.477 D | High | Substantial inter-individual variation (−3.875 to 2.467 D) indicates heterogeneous corneal toricity |
J45 (Oblique) | Quantifies oblique astigmatism (45°/135° meridians) | |
Mean = −0.009 D | Near zero | Minimal oblique astigmatism; primary astigmatism is orthogonal (vertical/horizontal) |
SD = 0.263 D | Moderate | Clinically relevant inter-eye differences exist (−2.748 to 3.123 D) |
Cylinder (C) | Total astigmatic power | |
Mean = −0.781 D | Moderate | Characteristic of myopic astigmatism cohort |
Axis (α) | Orientation of steep meridian | |
Mean = 87.6° | Vertical steepening pattern, consistent with ATR dominance (J0 < 0) |
