الفهرس 
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Abstract
SUMMARY
Intermittent exotropia (IXT) is a common type of ocular misalignment (strabismus) in both children and adults. A significant myopic shift under binocular conditions is observed in IXT with a relatively large angle; thus, IXT patients rely on increased accommodation, and this in turn may induce eye strain and discomfort. There are different surgical and non-surgical management strategies for IXT.
While excimer laser refractive surgery is a well-known procedure for correcting refractive errors, its use in adult patients with accommodative or partially accommodative esotropia who wish to remove their glasses, and those with high anisometropia and exotropia has not been extensively studied.
The aim of the current study was to compare the effect of myopic LASIK overcorrection on deviation degreein myopic patients with exotropia in comparison with myopic LASIK with optimum correction on deviation degree also in patient with exoptropia.
This is a randomized interventional study was conducted on 60 patients with intermittent exotropia and myopia in private hospital in Beni-suef Government after approval by the department of ophthalmology, faculty of medicine, Beni-suef University during the period from April 2020 to march 2021.
Written Informed consent had been taken from all studied participants prior to beginning of the study. Patients were divided into two groups. In group A (30 patients); myopic LASIK were done with optimum correction. In group B (30 patients) myopic LASIK were done with over correction.
Participants’ age, gender, preoperative spherical equivalent OD and OS, UCVA and BCVA of both studied groups were matched without a statistically significant p-values.
all the studied participants in both groups before LASIK had intermittent exotropia and myopia, after LASIK, there was a statistically significant decrease of the angle in patients underwent overcorrection (15.56±8.00) compared to patients underwent optimal correction (30.50±12.06) (P-value<0.001). this finding means that myopic refractive error overcorrection may help to improve control and alignment in intermittent exotropia.
We may conclude that preoperative intermittent or manifest exotropia is not a contraindication for LASIK surgery provided some specific recommendations are considered. We concluded that LASIK overcorrection could improve the intermittent exotropia in myopic patients.