Prospective study, conducted at Tanta University Ophthalmology Department Measurement of macular and choroidal thickness before and after strabismus surgery

This is a prospective study and will be conducted in Tanta University hospital

• Duration: February 2020 till May 2020 and may be extended
• The study will include 30 patients who suffer from esotropia or exotropia, inferior oblique (IO) over-action with or without any other type of horizontal deviation

Pre-operative measurement of the macular and choroidal thickness by Enhanced Depth Imaging Optical Coherence Tomography (EDI-OCT).

Post-operative measurement: First day, first week, one month then 3 months.

Inclusion Criteria:

• No prior history of ocular surgery or trauma
• Normal ocular examination findings
• No medical or family history of retinal disease, glaucoma or diabetes mellitus.

Exclusion Criteria:

• Patients with orbital and/or craniofacial abnormalities
• Patients with sensory or restrictive strabismus or neurological disease
• Preoperative retinal or macular pathology
• Patient who is unable to cooperate to do OCT scanning

All individual with strabismus fulfilling the inclusion criteria