Enhancement of Emmetropization in Hyperopic Infants
To determine if wearing a moderate spectacle under-correction (3.00D) and performing activities designed to stimulate accurate accommodation during a 15-month period will enhance emmetropization in highly hyperopic (between +5.00D and +7.00D) 3-month old infants.
|Study Design:||Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Enhancement of Emmetropization in Hyperopic Infants|
- The primary outcome will be to determine if the criterion level for emmetropization (≤+3.00D by 18 months of age) is met and maintained by at least 70% of treated infants. [ Time Frame: 15 months ] [ Designated as safety issue: No ]
|Study Start Date:||December 2007|
|Study Completion Date:||September 2010|
|Primary Completion Date:||September 2010 (Final data collection date for primary outcome measure)|
Infants will receive spectacle under-correction of their hyperopia.
Infants will receive spectacles with 3.00D of under-correction relative to the spherical equivalent in each eye as measured by the cycloplegic retinoscopy performed at baseline. They will also receive the full amount of measured astigmatism in their glasses. Changes in spectacle lens power will be made as needed at follow-up visits to keep the level of under-correction within 0.50D of the target 3.00D. A program of visual engagement is also provided to encourage the normal development and use of accommodation. Treatment will continue for 15 months (until 18 months of age) or until the infant reaches a spherical equivalent refractive error of +3.00D or less hyperopia.
Other Name: Under-correction
The purpose of the project is to determine if emmetropization can be enhanced in very farsighted babies. We will give them glasses with a partial correction, an amount that is less than their full degree of farsightedness but enough to put them in the zone of effective emmetropization. This 'boost' is meant to enable very farsighted babies to use their eyes in a normal way and emmetropize as normal infants. This partial correction would be given at 3 months of age for a period of up to 15 months. A program of visual engagement is also provided in order to encourage the normal development and use of accommodation. As changes in farsightedness occur, the power of the glasses will be reduced at follow up appointments to keep the farsightedness within the zone of effective emmetropization. Once an infant reaches a normal amount of farsightedness, the glasses would be discontinued.
|United States, Ohio|
|The Ohio State University College of Optometry|
|Columbus, Ohio, United States, 43210-1240|
|Principal Investigator:||Donald O. Mutti, OD, PhD||The Ohio State University College of Optometry|