Author/Authors :
Akbari, Mohammad Reza Strabismus Department - Eye Research Center - Farabi Eye Hospital - Tehran University of Medical Sciences, Tehran , Akbari-Kamrani, Marjan Strabismus Department - Eye Research Center - Farabi Eye Hospital - Tehran University of Medical Sciences, Tehran , Keshtkar Jafari, Alireza Professor of Ophthalmology - Strabismus Department - Eye Research Center - Farabi Eye Hospital - Tehran University of Medical Sciences, Tehran , Mohseni, Arman Assistant Professor of Mechanical and Energy Engineering - Power and Water University of Technology, Tehran , Ameri, Ahmad Strabismus Department - Eye Research Center - Farabi Eye Hospital - Tehran University of Medical Sciences, Tehran
Abstract :
Purpose: To evaluate the effect of tenotomy on visual function and eye movement records in
patients with infantile nystagmus syndrome (INS) without abnormal head posture (AHP) and
strabismus
Methods: A prospective interventional case-series of patients with INS with no AHP or strabismus.
Patients underwent 4-horizontal muscle tenotomy. Best corrected visual acuity (BCVA) and eye
movement recordings were compared pre and postoperatively.
Results: Eight patients were recruited in this study with 3 to 15.5 months of follow-up. Patients
showed significant improvement in their visual function. Overall nystagmus amplitude and velocity
was decreased 30.7% and 19.8%, respectively. Improvements were more marked at right and left
gazes.
Conclusion: Tenotomy improves both visual function and eye movement records in INS with no
strabismus and eccentric null point. The procedure has more effect on lateral gazes with worse
waveforms, thus can broaden area with better visual function. We recommend this surgery in
patients with INS but no associated AHP or strabismus.
Keywords :
4-Horizontal Rectus Muscle Tenotomy , Nystagmus without Abnormal Head Posture , Extraocular Muscle Surgery , Tenotomy , Congenital Nystagmus , Infantile Nystagmus Syndrome
