The Effect of Bifocals in Children With Down Syndrome

Radboud University Medical Center

Status

Completed

Conditions

Task Readiness

Accuracy of Accommodation

Prevention of Strabismus

Visual Acuity at Near

Treatments

Device: bifocals

Device: single vision glasses

Study type

Interventional

Funder types

Other

Identifiers

R0002308

2013-23 (Other Identifier)

Details and patient eligibility

About

Visual acuity at near improves in children with Down syndrome using bifocals

Full description

The accommodation is consistently reduced in 50 to 100% of children with Down syndrome and does not improve with age.

Enrollment

120 patients

Sex

All

Ages

2 to 14 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Diagnosed with Down syndrome (DS)
Accommodation lag >0.5 Dioptres for children with DS <12 years and >0.75 Dioptres for children older than age 12 or Visual acuity at near is worse than at distance and >0.1
Age range 2-14 years
Speaks Dutch as the first language
Must be verbal or able to understand instructions
Must be able to perform a task sitting on a chair and working at a table

Exclusion criteria

Visual acuity at near < 0.1
Not able to do vision tests at age over 5
Has worn bifocals already
Other significant eye diseases, such as keratoconus, cataract or high myopia (>S-6.00).
Diagnoses of any neurological, sensory or behavioural disorders such as autism, microcephaly or significant hearing loss.
Prematurity, born premature after a pregnancy term less than 36 weeks
Born after severe perinatal problems