SIGNIFICANCE OF HYPERMETROPIC REFRACTION IN IOL CALCULATION DURING PHACOEMULSIFICATION SURGERY

Abstract

Abstract: Accurate intraocular lens (IOL) power calculation plays a crucial role in achieving optimal postoperative refractive outcomes following phacoemulsification. In hypermetropic eyes, specific anatomical features such as shorter axial length, shallow anterior chamber, and thicker crystalline lens complicate the prediction of the effective lens position (ELP). Even minor biometric measurement errors may lead to significant refractive surprises. With the advancement of modern optical biometry and the introduction of newer formulas like Barrett Universal II, Haigis, and Olsen, the precision of IOL calculation in short eyes has markedly improved. This paper discusses the clinical significance of hypermetropic refraction in IOL power calculation, emphasizing proper formula selection, accurate biometry, and realistic refractive targeting to ensure satisfactory visual results.