Preoperative Positioning and Progression of Fovea-on Retinal Detachments

To study the relationship between positioning and rhegmatogenous retinal detachment (RRD) progression before surgery in patients with a fovea-on RRD. Prospective, single-cohort study. Patients with fovea-on RRD admitted to hospital for bedrest before surgical treatment were recruited. Primary outcome was the shortest distance from the foveal center to the retinal detachment border on OCT. Secondary outcomes were measured with a head-mounted positioning sensor and included measures of head movement (linear acceleration and angular velocity) as well as measures of positioning regimen compliance. Distance from the fovea to the retinal detachment border. Overall, 50 patients with fovea-on positioned before RRD repair. One patient (1/50, 2%) progressed from fovea-on to fovea-off. Of the positioning measures, angular velocity demonstrated the strongest correlation with RRD border movement, whereas measures of positioning compliance showed nonsignificant correlation. After defining 3 movement groups: stable, intermediate, and mobile RRDs, we found that a doubling of head movement (angular velocity) correlated with a median RRD border progression of −6 μm/h, −75 μm/h, and −219 μm/h in the 3 groups, respectively. Rhegmatogenous retinal detachment border movement is correlated to angular velocity of the head, whereas compliance with our current positioning regimen does not have a significant impact on RRD border movement. Not all RRDs progress rapidly toward the fovea, but those that do seem to be highly influenced by head movement. For limiting RRD progression, a reduced movement positioning regimen may be superior to our current gravity-based approach. The author(s) have no proprietary or commercial interest in any materials discussed in this article.