الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 129 |  |  |
| | | from | 129 | | |
Abstract
The palpebral fissure is the area between the open eyelids. Although numerous variations exist in the positional relationship of the lid margins to the limbus, generally the upper lid just covers the superior limbus, when one’s eyes are open and looking straight ahead. The lower lid position is more variable, usually lying within 1mm of the inferior limbus. The study included 68 eyes with horizontal strabismus. The aim of this study is to assess the effect of horizontal strabismus surgery recession, resection or combined recession-resection on vertical palpebral fissure height. All cases underwent complete ophthalmological and strabismus examination before and after surgical correction then follow up till 6 months after surgery. In this study there was 3 groups, group I:eyes underwent recession only(50eyes), group II :eyes underwent resection only (10eyes), group III eyes underwent combined recession and resection (8 eyes). Eyes underwent recession showed widening of vertical palpebral fissure height occurred in half of them at six months of follow up .Eyes underwent resection showed narrowing of vertical palpebral fissure height till 6 months of follow up . Eyes underwent combined recession and resection showed that,widening of vertical palpebral fissured height occurred in 50% of eyes,25% of eyes showed narrowing of vertical palpebral fissure height Generally vertical recti muscles surgery have a higher effect on palpebral fissure height than the horizontal recti muscles. Amount of recession and resection not correlated with changes of vertical palpebral fissure height.