Visual Acuity

#A252500 LEA Playing Cards

are used to assess near vision. The child sorts smaller and smaller Symbols on the the cards until they cannot be recognized. Some children find it easier to place a 3-D PUZZLE piece on the matching LEA PLAYING CARD. They can also be used to stimulate amblyopic eyes. There are 64 cards with 8 cards in each of the following Symbol sizes: 16M (20/800), 10M (20/500), 6.3M (20/320), 4M (20/200), 2.5M (20/125), 1.6M (20/80), 1.0M (20/50), and .63M (20/32), at 16". There are two of each size of the four Symbols so the child can match pairs. Cards measure 1.60 x 2.75".

#A252700 LEA Symbols Flash Cards

were designed to meet the needs of people and children with multi handicaps. Hold up 2 cards with different Symbols of the same size so the child can "eye gaze" or point to the requested Symbol in a "2 alternative forced choice" presentation. If the child only has a "yes" response hold up one card and ask if the Symbol is an "apple", etc. Young children can name the Symbol or point to the matching Symbol. The Symbols are presented individually on cards that vary in size depending on Symbol size. This allows for easy sorting and identification of the different Symbol sizes. At 10 feet optotype sizes range from 20/200 to 20/8.

#A253300 LEA Gratings

(paddles) developed by Dr Hyvärinen. An easy to use tool for measuring grating acuities of infants, pre-verbal children and people with multi handicaps. An infant detects the presence of parallel lines of decreasing widths. The infant is likely to look at the striped paddle rather than the gray paddle. Three plastic paddles have gratings printed on both sides, which decrease in size: 0.25, 0.5, 1.0, 2.0, 4.0 and 8.0 cycles per centimeter (cpcm). A 4th paddle has a gray side used as an "alternative choice". Plot your findings on the graph to compare with "normal" visual development. #1010 COBBLER APRONS The gray apron is recommended when using the LEA GRATINGS to offer a plain background. The big pockets are great for holding all the little test toys. One size fits all.

#1022 THE Päivi Book

Great book used to play "looking" games with preschoolers and measure their acuity. Various sizes of LEA Symbols, used in acuity tests, are scattered under the "apple" tree and on the path to the "house". Visual discrimination & scanning skills are used to find the symbols. Parents can share their child's responses with the doctor if there are concerns. Prepares children to have their acuity measured with LEA Symbol tests.

#A259900 LEA Symbols Distance Vision Screener

consists of a set of 8 flashcards , one for each acuity level between 10/40 (20/80) and 10/10 (20/20) standardized for testing at 10 fee. The Symbols on either side of each card are in a different order, one side for right eye and the other side for left eye. The background of the test is a pale gray, with the exception of a rectangle of white surrounding each line of Symbols. The directions are printed on the front card of the test. Cards are attached by a spiral binding for ease of testing. 3 1/2 in X 9 1/2 in.

#A252000 Lea Symbol Near Vision Screener

is an 8" X 10" card with a 16" cord attached for accurate testing. The 5 Symbols printed at each acuity level fit within a white rectangle defined by a pale gray background. There are 2 columns of decreasing size Symbols, one for the right eye and one for the left eye.

#A251500 Lea Symbol Domino Cards

to train amblyopic eyes when the child is patched. Present the DOMINO CARDS with decreasing sizes of Symbols on them. The cards can also be used in a fun way to assess vision of children as young as 2 yrs of age. There are 48 domino like cards with a Symbol on one end and a different Symbol on the other end. Consists of 3 packs of cards with Symbol sizes: 3.2M (20/160) .80M (20/40), 2.0M (20/100) & 5M (20/25), 1.25M (20/63) & .32M (20/16) at 16”. Measures 1.6” x 2.75”.

#A250800 The LEA Symbol Near Vision Card

is used to assess near vision. The child holds the 16” attached cord near an eye. Symbols on one side of the card are in the “standard” presentation. On the other side the Symbols are close together mimicking the placement of letters in words. The close spacing makes it a screening for amblyopia and can give an estimate of print size for beginning readers. Attached cord maintains a 16” distance. Optotypes from 8M (20/400) to .20M (20/10). Measures 8” x 10”.

#A250700 Crowded Symbol Book

If a linear test is too difficult for a child this spiral bound test is the next step in measuring acuity. The LEA Symbols are easy for young children to identify. On each page there is one Symbol in the middle and a different Symbol on each of the four sides. Identification of the middle Symbol is what you test. There are 4 pages for each Symbol size. Each page measures 5” x 5”.

#A250600 The Single Symbol Book

(developed by Dr. Hyvärinen) is used to assess distance vision in children who are unable to respond to linear charts. An excellent test for 2 to 3 year olds. Practice cards are included so a child can either name or point to the matching Symbol in the test. Spiral bound for ease of testing There are 1 to 4 Symbols of the same size per page. Symbols range in size from 20/200 to 20/10 at 10'. Cover piece is included so one Symbol can be presented at a time. Measures 5”x5”.

#A274000 LEA Single Number Book

Is ideal to use when a child or adult cannot perform with a line test. Can help determine the best resolution of the visual pathway in a child or adult with amblyopia or impaired vision. Optotype sizes range from 20/200 to 20/8 equivalent. Isolating cover is including allowing for single presentation. 13 pages each 5" x 5".

#A250100 The LEA Symbol 15 Line Distance Chart

is a linear test used to assess distance vision. Effective for screening amblyopia beginning at 4 yrs. The back of the chart has a black surface against which contrasting objects can be placed. In severe visual impairment, it functions as a near test. It folds for portability. For testing at 10', optotypes range from 20/200 to 20/10. Lines 20/40 to 20/10 are presented in 3 groups to prevent memorization when testing binocularly and monocularly. Measures 17” x 22”, folds to 17” x 11”

#A258000 The Colenbrander Low Vision Chart

utilizes LEA Symbols and designed for testing extreme low vision children and adults . Design courtesy of August Colenbrander, MD. The optotypes range from 20/1000 to 20/20 equivalency at one meter. An attached cord has an occluder attached to maintain proper testing distance. This test is excellent for children and adults who have difficulty with word retrieval.

#A272100 The Colenbrander Low Vision Chart

utilizes LEA Numbers and designed for testing extreme low vision children and adults . Design courtesy of August Colenbrander, MD. The optotypes range from 20/1000 to 20/20 equivalency at one meter. An attached cord has an occluder attached to maintain proper testing distance.

#A270900 The LEA Near Vision Card

is used to assess near visual acuity. Test at the attached 16" cord unless reading glasses are used, then test within range of best focus. Calculate visual acuity based on testing distance. For linear testing utilizing LEA number optotypes from 8M (20/400) to .20M (20/10) size at 16".

#A271200 or #A2713 LEA Number 100% Translucent Distant Chart

This 100% contrast chart was designed to be used in The Model A Cabinet for Translucent Charts (#A600000) offering proper test lighting conditions. The chart can also be hung on the wall. Use it with the 2.5% low contrast chart (#A2716) and you can compare the Snellen findings for 100% and 2.5% contrast levels.

#A600600 The Model A Cabinet for Translucent Charts.

This lightweight cabinet can be placed on a table or hung on a wall. The sturdy metal cabinet only weighs 5 pounds. Charts can be stored in the cabinet. Charts need to be ordered separately. Cabinet offers unified lighting where ever you travel.

#A271100 15 Line LEA Folding Distance Chart

is used for testing at 10'. LEA numbers from 20/200 to 20/8. Lines 20/40 to 20/8 are presented in three groups to prevent memorization when testing binocularly and monocularly. Measures 18" x 19.5" folds to 18" x 9.7".

#A735000 The 15 Line Distance Letter Chart

uses Sloan letters and is designed to test at 10 feet. The letters range in size from 20/200 to 20/10. Lines 20/50 to 20/10 are in 3 groups to prevent memorization when testing with both eyes and each eye individually. Measures 18”x18” folds to 18”x9”.

#A729000 The Near Vison Card with Cord

is a two sided test using Sloan letters arranged in a different order on each side. You can test binocularly and monocularly without memorization of letters. The 16” cord allows a consistent distance. Letters range from 20/400 (8.0M) to 20/10 (.20M). Measures 7” x 9”.

#A258800 LEA Symbol Outlined Distance Chart for 10 feet.

For screening young children with this 50% spaced Symbols with a rectangle box around the size Symbols from 20/200 to 20/8 equivalent. (18 X 20) Can be hung on the wall


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