Pursuit eye movements in late-onset esotropia.
Horizontal, smooth pursuit eye movements were recorded from adults and children with infantile and late-onset esotropia using a remote, video-based, eye-movement recording system. Each subject monocularly tracked a 0.5-degree target moving back and forth on a video monitor at a constant velocity of 10 degrees, over a range of 12 degrees. Each subject's nasal and temporal gain (eye velocity/target velocity) was measured. Confirming the results of previous studies, we found that infantile esotropes had asymmetrical pursuit eye movements (nasal gain greater than temporal gain) while late-onset esotropes had symmetrical gains. However, unlike previous investigators, we found that half of the late-onset esotropes had impaired pursuit gain. The magnitude of the pursuit abnormality and the amount of refractive error were correlated--patients with the highest refractive error had the lowest pursuit gain.
Sokol
S
S
Department of Ophthalmology, New England Medical Center, Boston, Mass.
Peli
E
E
Moskowitz
A
A
Reese
D
D
D000328:Adult; D002648:Child; D002675:Child, Preschool; D004948:Esotropia / Q000503:physiopathology*; D005133:Eye Movements; D006801:Humans; D007091:Image Processing, Computer-Assisted; D011698:Pursuit, Smooth; D012030:Refractive Errors / Q000503:physiopathology