The purpose of this study is to determine whether tropicamide + phenylephrine cyclopentolate + applied for once waiting 30 minutes to retinoscopy (new scheme) is not inferior to apply cyclopentolate alone and wait 45 minutes to retinoscopy (traditional scheme)
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
SINGLE
Enrollment
30
Traditional scheme. Cyclopentolate, repeat dosage 5 minutes and then wait 40 minutes to retinoscopy. Total wait 45 minutes.
New scheme. All drugs together and wait 30 minutes for retinoscopy
Pontificia Universidad Catolica de Chile, Departamento de Oftalmología
Santiago, Santiago Metropolitan, Chile
RECRUITINGChange in Spherical equivalent
In the first and second visit the spherical equivalent will be measured with retinoscopy. Change in spherical equivalent refraction from first visit to day average 18 days (second visit). On both visits the patient will receive different cyclopegia schemes.
Time frame: average 18 days
Change in spherical refraction
Change in spherical refraction between visit 1 and 2.
Time frame: average 18 days
Change in cylindrical refraction
Change in cylindrical refraction between visit 1 and 2
Time frame: average 18 days
iris motility
both schemes are effective in cycloplegia ? In visit 1 and 2 the iris motility after the cyclopegic schemes will be evaluated
Time frame: average 18 days
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