Teller Cards

Overview

Recognized worldwide as the gold standard for infant visual acuity assessment, Teller Acuity Cards provide an objective, non-verbal measurement of visual function in infants, toddlers, and individuals with developmental delays. Based on the proven principle of preferential looking—where infants naturally prefer to look at a patterned stimulus rather than a plain field—each card presents a high-contrast black-and-white grating alongside an equally bright gray space. By observing the patient's eye and head movements through the central observation aperture, clinicians can determine the finest grating frequency the patient can resolve, yielding an accurate spatial acuity rating. Manufactured in strict compliance with ISO 13485 quality standards, these durable, glare-free cards are an essential diagnostic tool for pediatric ophthalmology clinics, early intervention centers, and clinical research facilities.