OPTIMIZATION OF THE IOL OPTICAL POWER CALCULATION IN PATIENTS WITH COMPLICATED CATARACT AND PSEUDOEXFOLIATIVE SYNDROME

Abstract

Background. In recent years the phacoemulsification with IOL implantation (PHACO+IOL) is a «gold» standard for cataract surgery. This requires high refractive outcomes that depend upon a number of reasons. One of those is a change in the IOL position in the eye, which can be caused by dystrophic lesions of the zonular system of lens associated with the pseudoexfoliative syndrome (PEХ).Purpose. To increase the accuracy of IOL power calculations in patients with complicated cataract and pseudoexfoliative syndrome.Material and methods. A comparative analysis of refractive results in phacoemulsification with IOL implantation PHACO+IOL was performed in 57 cases of cataract with PEХ. All clinical materials were divided into two groups based on bio-microscopic characteristics: with initial and advanced PEX symptoms. All patients underwent standard examinations. A comparative analysis of refractive outcomes in the study groups was carried out using the «reverse calculation» method that consists in a recalculation of IOL power based on post-operative examination data in both groups.Results. There was no necessity in any amendments to the IOL power calculation in patients with cataract and initial PEX stage. An error of the calculated IOL power was detected in patients with advanced PEХ stage on an average 0.37±0.12D.Сonclusion. The detected error of the calculated IOL power in patients with advanced PEX stage requires an amendment amendment for A constant Am=A+0.3.

Keywords

• pseudoexfoliative syndrome
• iol calculation