Abstract
Purpose:
<br /> To examine the refractive outcomes of Boston Type 1 keratoprosthesis in aphakic eyes with silicone oil.
Methods:
<br /> Five patients with a history of pars plana vitrectomy and Boston Type 1 keratoprosthesis (KPro) with clear media and reliable post-operative manifest and/or auto-refraction were identified. The spherical equivalent of the measured post-operative refractive errors were compared to predicted refractive errors as determined by a mathematical model based on known physical parameters of the KPro and media and the axial lengths of the operative eyes.
Results:
<br /> Aphakic patients with Boston Type1 keratoprostheses had a mean hyperopic refractive error of +12.45 diopters as compared to a predicted mean error of +4.19 diopters (p = 0.04).
Conclusions:
<br /> Silicone oil significantly affects the post-operative refractive error of patients with Boston Type 1 keratoprostheses. Power calculations may need to be adjusted for aphakic patients undergoing keratoprosthesis surgery with permanent silicone oil tamponade.