The synkinesis between antero-posterior eye position and lid fissure width

Abstract

Abstract only

We have investigates the antero-posterios position of the eye during normal blinking, gentle and hard eye lid closing and voluntary lid widening with 12 young subjects. Computer-assisted video analysis was used to measure relative eye position. Involuntary blinks were accompanied by retraction of the eye, which was of similar magnitude to the retraction measured with lids restrained, while the lids of the contralateral eye gently closed. Eye retraction is accentuated with hard voluntary lid closure, while voluntary lid fissure widening produced slight proptosis of the globe. Preliminary data suggests a small degree of instability of antero-posterior eye position between blinks. Our results are consistent with previous studies of the association between antero-posterior eye position and lid fissure width.