Snellen Eye Chart-
Average Customer Rating(17 ratings)
- 10 Foot - Letters KVD at top is 14" x 9"(poster size)
- Made of durable plastic
Snellen Eye Chart
The Snellen Eye Chart is used to test visual acuity, position the patient 10 feet in front of the Snellen eye chart.
Allegro Medical presents the Snellen Eye Chart: This test measures how well you see at various distances. The eye chart itself -- the usual one is called Snellen's chart -- is imprinted with block letters that line-by-line decrease in size, corresponding to the distance at which that line of letters is normally visible.
The letters on the Snellen Eye Chart are, not surprisingly, called Snellen's test type. Each block letter is quite scientific in design (so that at the appropriate distance the letter subtends a visual angle of 5 degrees and each component part subtends an angle of 1 minute).
The 20 20 Snellen Eye Chart and the letters are named for a 19th-century Dutch ophthalmologist Hermann Snellen (1834-1908) who came up with them as a test of visual acuity. Visual acuity refers to the clarity or clearness of the vision, a measure of how well a person sees. The word "acuity" comes from the Latin "acuitas" = sharpness.
Customers who viewed this product also viewed:
Snellen Eye Chart is also listed in these categories below:
You have already voted for this. Thank you
You cannot vote for your own question or answer. Thank you
Q&A: Question About?
Snellen Eye Chart
Ask the community about this product and get answers. Share your knowledge and advice.
Learn More about Q&A.
Learn about Q&AQ&A allows customers to interact with one another in asking product specific questions and receiving answers from knowledgeable fellow customers and staff experts. Unlike the lengthy one-to-one support media such as email, phone, or live chat, Q&A captures those conversations and insights by displaying them directly on the product detail page - for all future customers to see. A single answer now aids multiple customers.
What is the required lighting specification for a Snellen eye chart (ie: 110 watts, 4 feet above and 2 feet in front)?
Asked on Jan 13, 2016 10:52:27 AM by Rob from CA
1 people had the same question
Part Number(s): 746 0230
Mfg Part Number(s): 4174
Scrip Part Number(s): 746 0230
Because our price on this item is lower than the manufacturer's suggested retail price, the manufacturer does not allow us to show you our price until you place the item in your shopping cart. Retailers like Allegro Medical have the legal right to sell products at prices we set. However, adding the item to your cart allows us to show you our lower price consistent with our promise of always offering you the lowest possible prices on the widest selection of medical supplies, medical equipment and life enhancing products.
Adding this item to your shopping cart won't require you to buy it. However, our prices do change. If you decide to purchase this item now you are guaranteed the price now displayed in your shopping cart. Complete your purchase by clicking on the "checkout" button or simply remove the product from your cart if you decide not to make your purchase at this time.