Binocular visual function in patients with Boston type I keratoprostheses.

Journal Article (Journal Article)

PURPOSE: To report the postoperative binocular function of patients with Boston type I keratoprostheses implantation for unilateral visual impairment. METHODS: Seventeen patients who underwent implantation of a Boston type I keratoprosthesis and had a best-corrected visual acuity better than 20/50 in the contralateral eye before surgery were evaluated. All subjects prospectively underwent sensory testing of binocular function including Bagolini lenses, Worth-4-dot test, stereoacuity at distance and near, and double Maddox rods. In addition, an assessment of ocular rotations and alignment was performed on each subject. RESULTS: Twenty patients with best-corrected visual acuity better than 20/50 in the contralateral eye at the time of keratoprothesis surgery were identified. Seventeen of the 20 patients underwent binocular visual testing, with 16 of 17 (94%) demonstrating binocular function. Second-degree fusion at near was demonstrated via the Worth-4-dot test in 13 of 17 (76%) patients. Third-degree fusion at near was demonstrated in 7 of 17 (41%) patients. Patients with better postoperative sensory binocular function tended to be of younger age (P = 0.05) and have better postoperative visual acuity (P = 0.006). Five patients were found to have some degree of ocular misalignment. Overall, patients with strabismus had worse binocularity (P = 0.04). CONCLUSIONS: Implantation of the Boston type I keratoprosthesis in patients with good preoperative visual acuity in the fellow eye is associated with useful binocular function in greater than 90% of patients.

Full Text

Duke Authors

Cited Authors

  • Pineles, SL; Ela-Dalman, N; Rosenbaum, AL; Aldave, AJ; Velez, FG

Published Date

  • December 2010

Published In

Volume / Issue

  • 29 / 12

Start / End Page

  • 1397 - 1400

PubMed ID

  • 20847681

Electronic International Standard Serial Number (EISSN)

  • 1536-4798

Digital Object Identifier (DOI)

  • 10.1097/ICO.0b013e3181da58d0


  • eng

Conference Location

  • United States