Visual Results After Boston Type 1 Kpro With Postoperative Complications Long Term

To describe postoperative complications' visual outcomes and resolution time after Boston type 1 keratoprosthesis (KPro) surgery. In addition to describing the frequency of types of complications.

Oftalmosalud Institute of Eyes, Lima, Peru

A single cohort analytical observational study was carried out on patients operated on with Boston type 1 keratoprosthesis (KPro) from 2018 to 2023. Patients with postoperative complications after KPro implantation were included in the study. Patients with a history of glaucoma preoperative to Kpro were excluded. Data were collected on uncorrected visual acuity (UDVA) and corrected visual acuity (CDVA) prior to the complication of the KPro implant and during the case resolution process. The characteristics of comorbidity, ocular diagnosis prior to KPro implantation, and type of complication were also reviewed.

25 eyes of 25 patients who presented any post-implantation complication of the KPro with a mean age of 55.6 ± 19.7 years were evaluated. Glaucoma (36 %) and retro-prosthetic membrane (28 %) were the most frequent complications. Mean UDVA and CDVA before the complication were 1.29 ± 0.9 LogMAR and 1.19 ±1.0 LogMAR, respectively. The mean UDVA and CDVA after resolution of the complication were 1.41 ± 0.9 LogMAR and 1.30 ± 1.0 LogMAR, respectively. The mean presentation time for the complication was 146.92 ± 146.1 days with a resolution time of 25.04 ± 21.5 days, where a Kaplan-Meyer analysis demonstrated that 100% of patients had resolved the complication by 12 months.

This study shows that even though Boston type 1 KPro-derived complications are common, the resolution of the complication occurs during the first year of presentation, with visual acuity not being significantly impaired