$13.00
1 in stock
The Snellen visual acuity chart was developed in 1862 by ophthalmologist Herman
Snellen. Snellen defined the “standard vision” as the ability to recognize the
letters of the 20 line optotypes at a distance of 20 feet, hence the term
"20/20".
Size: 1.5" tall
This soft enamel pin is cast from black nickel and filled with smooth epoxy
filling.
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We ship to addresses within the United States but do not ship internationally. Orders are typically processed and shipped within 2-3 business days. Delivery times vary depending on your location and chosen shipping method. Once your order has been shipped, you will receive a tracking number via email. Read More
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