study aiming to evaluate all children presented to strabismus clinic in ophthalmology department at sohag university hospital with divergent squint (exotropia) and to record surgical outcome of those who underwent strabismus surgery in our hospital

A hospital-based, prospective, interventional study include infants and children up to the age of 15 years with Primary Concomitant divergent squint (1ry concomitant exotropia),Candidate for surgical correction of squint.

Each patient will be subjected to Detailed history and Full preoperative ophthalmic & orthoptic evaluation including: Visual acuity , ocular motility in the 6 cardinal directions, Hirschberg test & angle of deviation.

,Cover test & prism cover test for distant & near fixation,Cycloplegic refraction , Anterior segment examination, fundus examination.

_ post operative Follow-up regimen:

1. Children will be examined after surgery on: 1st postoperative day, 1st week, 1st month, 3rd month, and 6 months postoperatively.
2. The following will be recorded for each patient: Visual acuity, cover test, ocular motility testing, cover test and prism cover test, the degree of postoperative eye position, presence of over-correction or under-correction, and presence of any other complications.

Inclusion Criteria:

1. Infants and children up to the age of 15 years.
2. Primary Concomitant divergent squint (1ry concomitant exotropia)
3. Candidate for surgical correction of squint

Exclusion Criteria:

1. Children with:

   1. Paralytic squint
   2. Consecutive exotropia
   3. Any neurological disorder
   4. History of previous squint surgery
   5. History of previous other ocular surgery (e.g. congenital cataract & glaucoma)

2. Children who missed follow up.