
LEA Charts
Pediatric Visual Acuity Screening Charts with Calibrated Geometric Symbols for Language-Free Diagnostic Accuracy

Overview
Engineered specifically for pediatric vision screening, early childhood development assessments, and non-verbal patient evaluation, LEA Charts provide an internationally validated alternative to traditional letter-based visual acuity tests. By substituting letters with four universally recognizable geometric symbols—an apple, house, circle, and square—this chart eliminates language barriers and literacy requirements while maintaining precise optical testing standards. The symbols are geometrically calibrated so that each shape presents the same visual challenge, ensuring that acuity scores directly correlate with standard Snellen and LogMAR values. Available in wall-mounted distance charts, near-vision cards, and illuminated lightbox formats, LEA Charts allow clinicians to quickly establish baseline vision, detect amblyopia, and track refractive changes in pediatric clinics, schools, and outreach programs. Manufactured in strict compliance with ISO 13485 quality standards, every chart delivers the clarity, high contrast, and durability needed for routine clinical practice.
Key Benefits
Four Calibrated Pedagogy Symbols: Utilizes four calibrated, easily recognizable shapes (apple, house, circle, and square) designed to maintain equal blurring thresholds for reliable screening in young children and non-verbal patients.
Standardized LogMAR Calibration: Features precise geometric spacing and uniform logMAR line progression, allowing clinicians to measure visual acuity changes with high statistical accuracy across repeat examinations.
Wipeable & Chemical-Resistant Substrate: Printed on durable, heavy-duty matte vinyl or non-yellowing plastic that resists glare and tolerates routine clinical surface disinfection without fading or warping.
Technical Specifications
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