Intermittent Exotropia
Conditions
Brief summary
Non-surgical treatment (ie. patching or fusion exercises) of intermittent exotropia may help in increasing control of strabismus
Interventions
PROCEDURENon surgical therapy
patching or fusion exercises
Sponsors
Singapore National Eye Centre
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
3 Years to 12 Years
Healthy volunteers
Yes
Inclusion criteria
1. Age 3 to 12 years (inclusive) 2. IXT for distance or constant IXT for distance and either IXT or exophoria for near 3. IXT size of \> 10PD 4. Visual acuity in worse eye of at least 0.3 logMar (Snellen 6/12) 5. Visual acuity of no greater than 2 lines between eyes 6. Parents or guardian willing to accept randomization, and to continue with observation or treatment for at least 6-12 months, unless deterioration of strabismus or fall in best corrected visual acuity of worse than 0.3logMar (Snellen 6/12) in either eye 7. Investigator willing to observe IXT untreated for at least 1 year
Exclusion criteria
1. Previous non-surgical treatment for IXT, or patch treatment for amblyopia within the last year 2. Prior strabismus, intraocular or refractive surgery or botulinium injection 3. Surgery planned within the next year 4. Prematurity (birth weight \< 1500g, gestational age \< 34 weeks), systemic illness (eg. cerebral palsy), syndrome (including craniosynostosis) or learning disability 5. Any ocular abnormality (cornea, lens or central retina); nystagmus or conditions that limit eye movements.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Control of strabismus | 1 year |
Countries
Singapore
Outcome results
None listed