الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 86 |  |  |
| | | from | 86 | | |
Abstract
The aim of this study is to evaluate range of extraocular muscle motility after horizontal strabismus surgery (recession, resection and tucking procedure) using Lees screen test. Twenty-four patients (56 operated extraoculer muscles) were recruited in this prospective non randomized study, 8 males and 16 females with age range from 10 – 40 years old.
They were recruited in ophthalmology outpatient clinic in Minia University hospital. All patients had concomitant horizontal strabismus with exclusion of cases with vertical or non comitant (paralytic or restrictive) strabismus. Patients with mental disturbances, amblyopia and previous squint surgery were also excluded.
All patients were fully evaluated for visual acuity, fundus examination, IOP, and Lees screen test preoperatively and at one week, one month and three months after operation which was performed by the same surgeon. For statistical purposes Hess score was calculated pre operatively and at each follow up for each individual extraoculer muscle.
To our knowledge, we are the first to quantify the postoperative underaction and overaction in every individual horizontal rectus muscle following surgery for the concomitant horizontal strabismus by using Lees screen.
In the current study, the postoperative ocular motility underaction was reported in more than half of the patients with concomitant horizontal strabismus who underwent resection, recession and plication procedures. The reported underaction at the 1st postoperative week disappeared by the 1st postoperative month in all patients except those where plication procedure was performed.
The risk factors for the development of postoperative underaction of ocular motility were plication procedure and operation of only one or two muscles and the factors associated with greater amount of postoperative underaction were operation in 2 muscles and plication procedure especially in lateral rectus. Age, sex and muscle operated whether lateral rectus or medial rectus was not risk factors for the occurrence of the ocular motility underaction.