Correlation of Axial Length and Corneal Radius of Curvature in Adult Indian Population
To evaluate the correlation between axial length (AL) and corneal radius of curvature (CRC).
Patients (n= 1228) were categorized based on AL(mm) as normal(AL= 22- 24.5), hyperopes(AL= 21- 21.99 and AL< 21), myopes(AL= 24.5- 27 and AL> 27) and anisometropes(inter-eye difference>1). Correlation between AL and average keratometry were evaluated.
A statistically significant inverse relationship was found between AL and CRC in normals (r= -0.55,p< 0.0001), myopes with AL<27(r= -0.41,p<0.0001) and hyperopes with AL> 21(r= -0.285,p=0.005). No correlation was seen in anisometropes.
Inverse correlation between AL and CRC demonstrates the eye’s ability to compensate for normal physiologically-driven axial length changes.