Teller Acuity Cards® are widely used to measure reticular acuity in infants, young children and people with disabilities. The broad evidence base gathered in their development and use provides a solid foundation for their application in ophthalmology, optometry and developmental practice. Teller Acuity Cards® are cited more than 5,000 times in the US National Library of Medicine National Institutes of Health (PubMed) and have been recognized as the Gold Standard for reticulated acuity testing worldwide.