LEA TEST SYSTEMS
The benchmark test for screening, for every stage.
The LEA Vision Test System is a comprehensive series of vision tests designed for children who have not yet learned to read letters, as well as patients who need an alternative to traditional letter based testing.
With tools for distance and near vision, contrast sensitivity, color vision, visual function, and specialized assessment needs, LEA helps professionals assess visual capabilities with accuracy, accessibility, and consistency.
Why Choose LEA
A complete system for accessible visual assessment
LEA Test Systems offer much more than a single eye chart. With more than 40 tests, the system supports assessment of visual capabilities in children and adults, including near vision, distance vision, contrast sensitivity, visual field, color vision, visual adaptation, motion perception, ocular function, and accommodation.
Multiple testing needs
Assess multiple areas of vision, including near and distance vision, contrast sensitivity, color vision, visual field, motion perception, ocular function, and accommodation.
Beyond letter charts
Support children, multilingual patients, nonverbal patients, and individuals who may not be suited to traditional letter based charts.
Consistent results
LEA Symbols are calibrated against the standardized Landolt C, with optotypes designed to blur equally for reliable visual acuity measurement.
LEA Test Range
Explore LEA® Vision Test System
LEA® includes a broad range of product formats and assessment tools, from symbols and numbers to contrast sensitivity, color vision, grating acuity, fixation, near vision, and specialized testing aids. The product families below offer a clear starting point for exploring the wider LEA® system.
LEA Symbols®
The LEA Symbols® Test was the first test created within the LEA® Vision Test System. It uses familiar optotypes, commonly identified as apple, house, window, and ring, to support visual acuity testing before children are ready to identify letters or numbers.
The LEA Symbols® Test is also used in the LEA® 3-D Puzzle, which incorporates color and familiar shapes to support testing in children as young as 14 months.
LEA Numbers®
The LEA Numbers® Test was developed after the LEA Symbols® Test and is used to test visual acuity in older children and adults.
Its layout is similar to a traditional number chart, with lines of numbers decreasing in size. Like LEA Symbols®, the numbers are calibrated against the Landolt C and designed to blur equally, supporting reliable visual acuity measurement.
LEA® Contrast Sensitivity
Contrast sensitivity is important for visual communication and everyday function. It can affect how well a child recognizes facial features, body language, classroom materials, blackboards, and projected information.
The Hiding Heidi Low Contrast Face Pictures test is part of the LEA® Vision Test System and uses face picture cards with different contrast levels to support child friendly contrast sensitivity assessment.
LEA® Grating Acuity Test
The LEA® Grating Acuity Test is designed to assess grating acuity, especially in children with severe or multiple visual deficiencies.
LEA® Gratings can be useful in specialized pediatric and functional vision assessment, including testing situations where children may have significant neurological or developmental challenges.
LEA® Color Vision
Support color vision screening for pediatric, adult, and low vision patients using accessible formats for red/green and blue/yellow deficiency testing. Designed to make color assessment practical across clinical, school, occupational health, and specialized testing settings.
LEA® Fixation
LEA® fixation tools support observation of visual attention, fixation, and early visual responses in patients who may not be ready for standard acuity testing. These tools are especially useful in pediatric, developmental, and specialized assessment settings where simple, engaging targets can help the examiner evaluate how a patient looks, follows, and responds.
The LEA Vision Test System was first developed in 1976 by Finnish pediatric ophthalmologist Dr. Lea Hyvärinen, MD, PhD.
Dr. Lea’s work in vision rehabilitation and assessment began during her time at the Wilmer Eye Institute of Johns Hopkins Hospital. Since the 1970s, she has trained rehabilitation teams, designed visual assessment devices, and taught extensively in pediatric and functional vision assessment.Partnership
The Good-Lite partnership behind LEA Test Systems
Good-Lite is proud of its longstanding relationship with Dr. Lea Hyvärinen and is honored to be the exclusive manufacturer of physical LEA system charts in the United States. This partnership supports Good-Lite’s continued commitment to providing reliable and innovative vision assessment tools for children and adults.
As a trusted leader in vision testing since 1930, Good-Lite helps professionals access LEA products for pediatric care, schools, clinics, occupational health, community programs, research settings, and specialized visual assessment.
Latest articles
Latest Blog Posts and Resources
Continue learning about the LEA Vision Test System, pediatric visual acuity testing, product selection, contrast sensitivity, and accessible assessment through Good-Lite’s supporting LEA resources.
LEA Legacy in Pediatric Screening
LEA Symbols, created by Dr. Lea Hyvärinen and stewarded by Good-Lite, support accurate equitable vision screening for children worldwide.
The Gold Standard for Early Vision Screening
Optotype design plays a critical role in early vision screening accuracy. This article explains why LEA optotypes are scientifically validated and widely recommended for preschool assessment.
How LEA Symbols Make Vision Screening Fun and Inclusive
Effective vision screening depends on participation. This article explains how LEA Symbols use child-friendly, inclusive design to support accurate screening across developmental stages and cultures.
Find the right LEA tools for your testing needs
Explore Good-Lite’s LEA product range and choose from vision testing tools designed for accuracy, accessibility, and reliable assessment across children and adults.
