Automated Video Vision Development Assessment (AVVDA)
“The Cibis Test”

AVVDA is a video screening test that checks for strabismic and amblyogenic factors, refractive errors, and pupil defects in children ages six months to six years.

Amblyopia (lazy eye) is a lack of vision development usually in one eye because of undetected problems such as a need for glasses or eyes crossing. Amblyopia can be prevented if the existence of such amblyogenic causes is recognized. Amblyopia can also be treated by correcting amblyogenic factors and with patching of the good eye to force the “lazy” eye to work. The Cibis test detects a need for glasses or eyes crossing with high reliability. Children screened in this way are referred to pediatric eye care professionals for a complete examination and correction of their problem.

The test video photographs the patient sitting, often in a parent’s lap, 52 inches from the camera. A light, similar to the hand held instrument eye doctors use to examine patients, shines on the face and both eyes of the subject. The camera digitally records the pupil red reflex produced in this way. Software is used to capture useable frames (without movement, eyes closed, in focus, looking at the light source, etc.) which are then further analyzed. The red pupil reflex is different in calculable ways for different refractive powers of the eye (determining need for glasses or not) and when the eye is straight as opposed to deviated in or out. The software determines if the eyes are aligned or if one eye is deviated.

Children too young for reliable screening or testing, (ages six months to six years), should be screened in this way yearly. AVVDA testing can be done without an appointment during normal working hours at the Plaza office and Wednesday afternoons at our Independence office.