Enhancement of Emmetropization in Hyperopic Infants
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.
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.
Inclusion Criteria:

 -  3 months of age (between 8 weeks and 20 weeks)at the baseline examination

 -  Either gender, any ethnicity

 -  Birthweight greater than 2500g

 -  Normal pregnancy and delivery (including Cesarean section delivery but excluding
 serious complications or conditions such as eclampsia or rubella)

 -  Hyperopia of +5.00D or more but less than +7.00D spherical equivalent refractive error
 in each eye by cycloplegic retinoscopy using cyclopentolate 1%

 -  Currently under the care of a pediatrician

 Exclusion Criteria:

 -  Anisometropia greater than 1.00D (difference in spherical equivalent)

 -  Strabismus

 -  Previous history of difficulty with pupillary dilation

 -  History of cardiac, liver, asthma, or other respiratory disease

 -  History of ocular disease or active ocular inflammation