Collaborate with the team that built the standard.
Working with vision science researchers, optometric educators, and ophthalmology training programs to advance how visual function is measured and taught. Academic pricing, methodology consultation, investigator-initiated study support, and equipment access for grant-funded vision research.
PRODUCT CATEGORIES
Vision testing instruments engineered for measurement integrity.
Six instrument families covering visual acuity, contrast sensitivity, color vision, low vision, reading speed, and pediatric testing. Every product validated and peer-reviewed.
Visual Acuity Charts
ETDRS Revised 2000, Sloan Letters, HOTV, Lea Symbols, and pediatric optotypes. The standard for retinal trials, ophthalmology research, and clinical practice for over fifty years.
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Contrast Sensitivity
Pelli-Robson, Mars, and validated contrast sensitivity panels. Sensitive to early visual function changes that standard acuity testing misses.
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Reading Speed (iReST)
International Reading Speed Texts validated for low vision research and clinical assessment in seventeen languages. Tablet and print formats.
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Low Vision Testing
Specialized instruments for severely impaired vision: enhanced contrast, simplified optotypes, validated low-vision protocols.
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Pediatric Vision Testing
LEA Symbols, Teller Acuity Cards, HOTV, and shape-based optotypes for pre-literate and developmentally diverse populations.
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Clinical Trial Solutions
End-to-end ophthalmic trial infrastructure: certified equipment, investigator certification, training, and centralized quality monitoring.
Explore CTS →WHO THIS IS FOR
Built for vision science programs and PI-led research.
Principal Investigators
PIs leading NIH-funded, foundation-funded, or industry-sponsored vision research. Equipment access, methodology consultation, and citation support.
Residency Programs
Optometry and ophthalmology residency programs equipping training facilities. Educational pricing and protocol training available.
Academic Consortia
Multi-institution research consortia standardizing visual function measurement across participating sites. Centralized equipment + training support.
The instruments behind the science.
Bestsellers across clinical practice and clinical research. Every product manufactured in Woodstock, Illinois under ISO 13485:2016 quality management.
Gold Standard
Vision science research collaborations are genuine, not transactional. We don't require co-authorship or commercial rights to participate. PIs leading NIH-funded, foundation-funded, or industry-sponsored vision research get methodology consultation, equipment access at academic pricing, and full citation support. The same standard applies to optometry and ophthalmology residency programs equipping training facilities, and to academic consortia coordinating multi-site studies.
Six universities, one standardized measurement protocol.
An NIH-funded multi-institution consortium standardized visual function measurement across six university research centers. PV provided equipment at academic pricing, centralized calibration training, and methodology consultation through grant submission and study execution.
"We were able to write the methodology section once and have it apply identically to every site. That alone saved us months of revision cycles with the funder."
Talk to our research team
Tell us about your study, the measures you need, and the sites involved. Someone from the research team will read it and reply by email.