Surgery for intermittent Divergent squint: A Comparison of Outcomes Following Two Different Surgical Techniques
- Conditions
- Divergent squint [ intermittent exotropia]Eye - Diseases / disorders of the eye
- Registration Number
- ACTRN12610001053011
- Lead Sponsor
- Auckland District health board
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- ot yet recruiting
- Sex
- All
- Target Recruitment
- 120
Age 3-18 years
History of intermittent exotropia intermittent at either near or distance
Full eye movements
Visual acuity 6/9 or better each eye best corrected with crowded test by the time of surgery
Any myopic refractive error, anisometropia or astigmatism of 1 dioptre or greater or hyperopia which is reducing the vision to less than 6/9 must be treated prior to inclusion.
Basic exotropia with difference between near and distance measurements <10 dioptres, or simulated divergence excess with difference between near and distance measurement <10 dioptres after +3.00 test and/or patch test.
Able to obtain full informed consent from the family for randomisation
Able to obtain accurate prism cover test measurements (distance and near cover test within 5^ on at least 2 visits)
Unable to obtain accurate prism cover test measurement
Convergence insufficiency exotropia or true divergence excess
Anyone with neurological/systemic abnormalities as the surgical result can be unpredictable
Anyone requiring oblique muscle surgery
Previous eye muscle surgery
Adjustables
A” greater than 10 or V” greater than 15dioptres
Anyone unwilling to be randomized
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Comparison between two techniques for intermittent exotropia.,{Bilateral lateral recti reccession or medial/ lateral rectus recession/ resection regarding the success rate. and this is measured by diopter [ the surgery considered successful if the residul squint is less than 10 Diopters[At 2 years after randomization]
- Secondary Outcome Measures
Name Time Method Does the patch test alter the distance measurements and therefore the surgical target the effect of patch test.<br>we patch the involved eye for 20, 40 ,60 min at different intervals and do measure amount of squint in diopters[At 2 years after randomization]