Analysis Of The Application Of New Formulas For Intraocular Lens (Iol) Calculation

To evaluate the clinical outcomes of cataract phacoemulsification (Phaco) with the implantation of a new type of intraocular lens and to determine the optimal formula for calculating the dioptric power of the lens, regardless of axial length and corneal curvature.

The use of specialized calculators, such as Barrett Universal II, Kane, and Hill-RBF, helps minimize errors and ensures precise IOL selection even in cases of complex eye anatomy, such as short or long eyes. This is particularly crucial for patients who seek maximum independence from eyeglasses after surgery. Thus, the implementation of modern IOL calculators in clinical practice is a key step toward enhancing the effectiveness of cataract surgery and improving patients' visual quality.

A retrospective analysis was conducted on 48 patients (96 eyes) who underwent outpatient cataract and presbyopia surgery with the implantation of RayOne Galaxy (Rayner) spiral intraocular lenses. All patients had no significant concomitant ocular pathology and underwent surgery for age-related cataract and presbyopia for the first time. The study group included 21 men and 27 women, with a mean age of 56 years (ranging from 42 to 67 years). The calculation of IOL power was performed using the Barrett Universal II, SRK/T, Pearl-DGS, Raytrace, and KANE formulas. In all cases, soft Rayner RayOne Galaxy IOLs (model RAO605G) were implanted.

The implantation of the lens into the capsular bag was completed without complications. The postoperative period was uneventful. Preoperatively, the uncorrected visual acuity of the patients averaged 0.4 (ranging from 0.1 to 0.8), with all patients experiencing a decline in near and intermediate visual acuity. On the first postoperative day, distance visual acuity (5 meters or more) improved to an average of 1.1 (ranging from 1.0 to 1.2). Thus, 100% of patients reported a significant improvement in vision at far, intermediate, and near distances. No optical phenomena were observed under mesopic and nyctopic conditions (in twilight and nighttime). Near visual acuity (at 40 cm) was on average 1.0 on the first postoperative day and remained at 1.0 after one month.