Preferential Looking Test
A behavioral assessment technique using striped patterns to evaluate visual acuity in preverbal children.
Full Definition
The Preferential Looking Test exploits infants' natural tendency to prefer looking at patterned stimuli over blank fields. Test cards display gratings of varying spatial frequencies paired with blank gray fields of equal luminance. The examiner observes the child's eye movements and head turns to determine the finest grating pattern the child can detect, providing an estimate of visual acuity. This method is particularly valuable for assessing vision in children too young for verbal acuity testing, typically those under 3 years of age.
Usage
Usage note: Capitalize when referring to the specific test methodology; lowercase when used descriptively.
In Context
- "The 18-month-old patient underwent Preferential Looking Test evaluation due to suspected visual impairment." — Clinical assessment report
- "Preferential Looking Test results indicated reduced acuity in the left eye compared to age-matched norms." — Vision screening documentation