Posterior Corneal Asphericity and the Refractive Outcome after Combined Phacovitrectomy

Abstract

Background We assessed the correlation of posterior corneal asphericity and the refractive prediction error of the SRK-T and Barrett II Universal formulas for eyes following phacovitrectomy with peeling of the internal limiting membrane (ILM).

Patients and Methods We retrospectively analyzed 41 eyes of 41 patients following a combined phacovitrectomy with ILM peeling. Surgeries were performed by one fellowship-trained vitreoretinal surgeon between 2016 and 2021.

Results Of the 41 patients, 41 eyes were included, with all having at least 1 month of postoperative data. Of the 41 eyes, 19 eyes were female (46%) and 22 were male (54%). The average age of the study population was 77.5 ± 10.7 years. The mean axial length (AL) was 22.7 ± 4.6 mm and the mean anterior chamber depth (ACD) was 3 ± 0.8 mm. The mean posterior Q value was − 0.29 ± 0.27. The mean absolute error (MAE) values 1-month postoperatively for the SRK-T and Barrett II Universal formulas were 0.73 and 0.65, respectively. Regression analysis yielded a significant correlation between posterior corneal asphericity and SRK-T MAE (r = 0.35, R² = 0.12, p < 0.05) only.

Conclusions Posterior corneal surface asphericity is correlated to the refractive error of the SRK-T formula for eyes following phacovitrectomy.

Zusammenfassung

Wir untersuchten die Korrelation der hinteren Hornhautasphärizität und des refraktiven Vorhersagefehlers der SRK-T und Barrett II Universal Formeln für Augen nach Phakovitrektomie mit Peeling der Membrana limitans interna (ILM).

Die mittleren absoluten Fehler (MAE) 1 Monat postoperativ betrugen für die SRK-T- und Barrett II Universal-Formeln 0,73 bzw. 0,65. Wir fanden eine signifikante Korrelation zwischen der posterioren Hornhautasphärizität und dem SRK-T MAE (r = 0,35, R2 = 0,12, p < 0,05).

Key words

asphericity - phacovitrectomy - cataract - internal limiting membrane

Schlüsselwörter

Katarakt - Phakovitrektomie - Asphärizität

Publication History

Received: 04 July 2022

Accepted: 04 January 2023

Article published online:
25 April 2023

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