Cycloplegia
Conditions
Keywords
vision, cycloplegia, cycloplegic refraction, cyclopentolate, cyclogyl, tropicamide, mydriacil, refractive errors, latent hyperopia
Brief summary
The primary outcome of this study is to compare cyclopentolate 1% and tropicamide 1% for cycloplegic refractions in pediatric populations. This will be a prospective double-blinded randomized clinical trial (RCT), multi center, with randomized sequencing of cycloplegic agent; each patient received one agent at one visit, and the other agent in the next visit (2 different visits ≥ 1 week apart) within 3 months.
Detailed description
Refractive errors assessment especially in pediatric populations is usually affected by the accommodative spasm and possibly a myopic shift in the results. Spasm of accommodation become evident as pesudomyopia or latent hyperopia. Therefore, cycloplegic refraction using cycloplegic drugs is an effective way to reduce fluctuation in accommodation or spasm of ciliary muscle. The drug of choice should have a rapid onset, appropriate cyclopegic effect and minimum side effects. Cyclopentolate and Tropicamide are well known drugs used for accommodation relaxation. Cyclopentolate is widely accepted drug of first choice for patients of all ages. Its cycloplegic effects begins at 25-75 min after administration of the drop and recovery appears through 6-24 h later.6 Ocular side effects may include irritation, lacrimation, allergic blepharoconjunctivitis, conjunctival hyperemia, and increase in intraocular pressure. Some of its systemic side effects are drowsiness, ataxia, disorientation, incoherent speech, restlessness, and visual hallucinations. Tropicamide, as an alternative, is a synthetic analog of tropic acid and is known as a safe agent for cycloplegic refraction. It characterized by a rapid onset and the cycloplegia effect appears 20-30 min after administration. Its recovery appears 6 h later with safer profile compared to cyclopentolate. Several studies have been conducted to compare the cycloplegic effect of these two agents and different results have been reported. Because of inconsistencies in the previous reported results, this randomized clinical trial was conducted to compare the cycloplegic effect between cyclopentolate and tropicamide among pediatric populations (aged between 3 and 16).
Interventions
DRUGCyclopentolate
Well known eye drop used for cycloplegic refraction among children.
DRUGTropicamide
Well known eye drop used for cycloplegic refraction among children.
Sponsors
Islamic Hospital, Jordan
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Investigator)
Eligibility
Sex/Gender
ALL
Age
3 Years to 16 Years
Healthy volunteers
Yes
Inclusion criteria
* Age: 3-16 years * Brown irides; grade 4 and 5 using iris color classification system developed by Seddon et al (16) * Duration: 2 different visits ≥ 1 weeks apart within 3 months
Exclusion criteria
* Abnormal red reflex (e.g., media opacity) * History of heart or neurological diseases * History of developmental delay * History of a previous allergy to cycloplegic agents * Presence of syndromes (e.g., Down's syndrome) * History of intraocular surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Spherical equivalent (SE) mean difference between cyclopentolate and tropicamide | 3 months | To study the SE of each drug and compare the mean difference between cyclopentolate and tropicamide |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Amplitude of accommodation | 3 months | To measure the depth of cycloplegia mean difference between cyclopentolate and tropicamide |
Countries
Jordan
Outcome results
None listed