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Lea Symbols

Providing you the best range of LEA Symbols Playing Cards, 10m Optotypes Low Contrast Flip Chart, 10m Lea Symbols Low Contrast Test, Lea Symbols 13-Line Translucent Distance Chart, Lea Symbols Runge Pocket Card and Lea Symbols Single Symbol Book with effective & timely delivery.

LEA Symbols Playing Cards
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BrandGood Lite USA
MaterialPaper
Usage/ApplicationEye Testing
ColorWhite And Black
No of Pages6
Size3.25" x 9" (8.25 cm x 22.9 cm).

Goods-Lite USA

LEA Symbols Playing Cards (#252500)

With the valuable assistance of skilled team of professionals, we are engaged in offering an extensive range of high-quality LEA Symbols Playing Cards.

Other Details:

  • Now it is easy to measure, record and detect changes in the transfer of visual information when the change only affects visual acuity at low contrast levels. Chart presents numbers at the following contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%. Pages are offset for easy flipping. Each chart includes recording forms and instructions.

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10m Optotypes Low Contrast Flip Chart
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BrandGood-Lite USA
MaterialPlastic
LanguageEnglish
ShapeRectangular
Usage/ApplicationEye Testing
Testing Distance10m
No of Pages06
Size22.9x8.25 cm

Good-Lite USA

270400 10m Optotypes Low Contrast Flip Chart

Keeping in mind ever-evolving requirements of our respected clients, we are offering a premium quality range of 10m Optotypes Low Contrast Flip Chart.

Other Details:
  • Now it is easy to measure, record and detect changes in the transfer of visual information when the change only affects visual acuity at low contrast levels. Chart presents numbers at the following contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%. Pages are offset for easy flipping.


Additional Information:

  • Item Code: 270400

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10m Lea Symbols Low Contrast Test
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MaterialHDPE
LanguageEnglish
ShapeRectangular
Usage/ApplicationEye Testing
No of Pages06
Size22.9 cmx8.25 cm

Good-Lite USA
LEA Symbols Playing Cards (#251100)

Being one of the renowned firms in the industry, we are involved in providing a high-quality array of 10m Lea Symbols Low Contrast Test.

Other Details:
  • Test for quick measurement of low contrast visual acuity at 25%, 10%, 5%, 2.5%, and 1.25% contrast by measuring the distance where the symbols are seen. 10M symbols correspond to visual acuity 0.10 at 1 m, 0.05 at 0.5 m and 0.3 at 3 m. VA values are thus easy to calculate. Test includes a table for conversion to Snellen equivalent VA values, a response key, recording forms and instructions.


Additional Information:

  • Item Code: 251100
  • Delivery Time: 1 Week

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Lea Symbols 13-Line Translucent Distance Chart
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BrandGood-Lite USA
MaterialHigh-density polyethylene (HDPE)
ColorWhite
Display Size14" X 9" for 3 meters
LanguageLEA Symbols

 

Good-Lite USA
LEA SYMBOLS 13-Line Translucent Distance Chart(# 252400)  

Stereopsis Fly TestProportionally spaced (logMAR); line sizes range from 20/125 to 20/8 (6/38 to 6/2.4) equivalent, 0.16 to 2.50. This chart can either be wall mounted or used in an ESV1200, ESV1500, or a Model A+ illuminated cabinet. Includes response key and instructions.

10 feet/3 meters testing distance.

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Lea Symbols Runge Pocket Card
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BrandGood-Lite USA
MaterialPVC/Plastic
Model Name/Number756200
UsesPediatric
Digital (LED Back Lit)No

 

The Runge Near Vision Pocket Card with LEA SYMBOLS features a format that is both easier and faster to use for near vision screening. Developed by an ophthalmologist, this Sloan Letter Near Card mimics reading from left to right. LEA SYMBOLS optotypes on the front of the card contains line sizes ranging from 20/500 to 20/16 (equivalent).

The reverse side is printed with easy-to-follow answer key of front side test with no memorization required. Measurements of Snellen Distance (Feet), Actual Letter Size, Jaeger, Near, LogMAR, Decimal, and Snellen Distance (Meters) are listed for each optotype. Also printed with pupilometer with sizes ranging from 2 to 9.



Additional Information:

  • Item Code: 756200
  • Delivery Time: 2 week

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Lea Symbols Single Symbol Book
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Digital (LED Back Lit)Yes
BrandGood-Lite USA
MaterialPaper/Cardboard
Size5" x 5" (12.7 cm x 12.7 cm)
Item Weight250gm

 

Good-Lite USA

250600 Lea Symbols Single Symbol Book(#250600) 

The Single Symbol Book is designed for testing children and adults who have difficulties in perception of symbols in lines. The visual acuity values measured with single symbols are often several lines better than the line acuity values in persons with impaired vision and thus overestimate the quality of visual functioning. Single optotype line sizes from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50. Includes isolating mask, response key and instructions. 13 offset pages for easy flipping. 5" x 5" (12.7 cm x 12.7 cm).

10 feet/3 meters testing distance.



Additional Information:

  • Item Code: 250600
  • Delivery Time: 1 Week

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Lea Symbols Chart For Vision Rehabilitation
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BrandGood-Lite USA
MaterialPVC/Plastic
Chart Measures Size16" x 21.5"(40.7 cm x 54.6 cm),Folds to 16" x 10.75" (40.7 cm x 27.3 cm)
Testing Distance40 inches/1 meter
Product Code258000

Good-Lite USA
Lea Symbols Chart For Vision Rehabilitation (101550)

This test is designed for testing children and adults with visual impairment at a distance of one meter. The largest symbols are 50M in size, corresponding to 1m/50M = to 1/50 or decimal visual acuity 0.02, equivalent values 20/1000, 6/300. The smallest symbols are 1M in size corresponding to 1m/1M = to 1/1 or decimal visual acuity 1.00, equivalent values 20/20, 6/6. Designed courtesy of August Colenbrander, MD.



Additional Information:

  • Item Code: 258000

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Lea Symbols Flash Cards
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Digital (LED Back Lit)Yes
BrandGood-Lite USA
MaterialPaper/Cardboard
Item Weight500gm

Good-Lite USA

Lea Symbols Flash Cards (#252700)

This set of flash cards was designed for testing distance visual acuity in children and adults who have difficulty with visual acuity charts, the Crowded Symbol Book Test, or the Single Symbol Book Test. Line sizes from 20/200 to 20/8 (6/60 to 6/2.4) equivalent, 0.10 to 2.50. Includes response key and instructions. 30 cards per set, 4" x 5" (10 cm x 12.7 cm) to 5" x 5" (12.7 cm x 12.7 cm).

10 feet/3 meters testing distance.



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  • Item Code: 252700

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LEA Symbols Near Vision Card
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BrandGood-Lite
MaterialPlastic
ColorWHITE
Display Size10.1" X 8.1"

 

Good-Lite USA
LEA Symbols Near Vision Card (#250800)

This test assesses the functional vision of a child at near distances. 
Can also be used to familiarize child with testing procedure before introducing a distance test.
Proportionally spaced (logMAR) lines on one side and more tightly-spaced symbols on the opposite side. 
Line sizes range from 20/400 to 20/10 (6/120 to 6/3) equivalent, 0.05 to 2.00. 
Response key printed on test card. 
Includes training cards and instructions. 
Card measures 8 in x 10 in (20.3 cm x 25.4 cm).
16 inches/40 centimeters testing distance.


    Additional Information:

    • Item Code: 250800

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    LEA & HOTV Massachusetts Pediatric Symbols Chart
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    BrandGood-Lite
    MaterialPVC/Plastic
    UsageFor Eye Testing Children
    Age Group2 Year

    Good-Lite USA

    LEA & HOTV Massachusetts Pediatric Symbols Chart (# 257500)

    We are offering LEA & HOT V Massachusetts Pediatric Symbols Chart. Lea Symbols pediatric symbols on one side, HOTV optotypes on the opposite. 50% spaced rectangle (Massachusetts Visual Acuity Test format) with line sizes from 20/100 to 20/8 (6/30 to 6/2.4) equivalent. Has a hole for hanging the chart on the wall. Includes response key and instructions. 17" x 21" (43 cm x 53.4 cm). Notations include actual letter size for 10 foot and 3 meter measurements which are found on left side of the chart. Equivalent letter sizes notations include 20 foot, 6 meter, decimal and Log MAR measurements which are found on right side of the chart.



    Additional Information:

    • Item Code: 257500

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    Lea Symbols Crowded Symbol Book
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    Digital (LED Back Lit)Yes
    BrandGood-Lite USA
    MaterialPaper/Cardboard
    Item Weight250gm

     

    Good-Lite USA
    Lea Symbols Crowded Symbol Book (#250700)

    The Crowded Symbol Book is designed for testing children and adults who have difficulty in reading the optotypes on the big charts. This test is the smallest line test when the central symbol is used as the test symbol. The four symbols surrounding the central symbol interfere with the recognition of the central symbol closely the same way they do in line acuity charts. Because of the crowding effect, it often allows measurement of line acuity of young children much earlier than the visual acuity charts and thus helps in detecting amblyopia or impaired vision early. Line sizes from 20/63 to 20/16 (6/19 to 6/4.8) equivalent, 0.63 to 1.25. Includes response key and instructions. 16 offset pages, 5" x 5" (12.7 cm x 12.7 cm).

    10 feet/3 meters testing distance.



    Additional Information:

    • Item Code: 250700

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    Lea Symbols & Lea Numbers Near Vision Card
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    Digital (LED Back Lit)Yes
    BrandGood-Lite USA
    MaterialPaper/Cardboard
    Item Weight500gm

     

    Good-Lite USA
    Lea Symbols & Lea Numbers Near Vision Card (#251000)

    This card combines a LEA SYMBOLS line test on one side and LEA NUMBERS line test on the opposite side. 
    Proportionally-spaced lines from sizes 20/400 to 20/10 (6/120 to 6/3) equivalent. 
    Attached 16-inch (40cm) cord ensures proper assessment distance. Response key printed on test card. 
    Flash cards and instructions included. 8" x 10" (20.3 cm x 25.4 cm). 
    The string and ball ensures that the test is being performed from the correct distance to get the most effective results for the patient.
    16 inches, 40 cm testing distance.

    Additional Information:

    • Item Code: 251000
    • Delivery Time: 2 Week

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    Lea Gratings Test :Preferential Looking Test Good-Lite USA
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    MaterialHigh-density polyethylene
    UsageEye Testing
    ShapeRound
    Handle Size0.25,0.5,1.0,2.0,4.0 and 8.0 cpcm

     

    Good-Lite USA
    LEA Grating Paddles (#253300)

    • In adults visual acuity is measured as "recognition acuity", which uses standard line tests. 
    • This type of test cannot be used in examining infants and children with multiple impairments. 
    • Instead of recognition visual acuity, grating acuity is measured with grating acuity tests either as detection or discrimination acuity. 
    • LEA GRATINGS test is a detection test.
    • In the LEA GRATINGS test, the infant or child detects the presence of parallel lines of decreasing width, a task simpler than recognizing optotypes. 
    • When a striped pattern is presented in front of an infant simultaneously with a gray surface of the same size and luminance, the infant is likely to look at the striped pattern because there is more to see than on a gray surface. 
    • What the child sees on the grating cannot be known. From children who can describe what they see we have learned that the lines on gratings can be seen distorted, only in a small part of the grating or the lines are so distorted that no lines are perceived.
    • The LEA GRATINGS test uses paddles to present gratings. The handle allows the tester to hold the test easily. 
    • The gratings are defined by the frequency, i.e., the number of pairs of black-and-white stripes or cycles, within one degree of visual angle. When grating is printed on a surface, it can be defined also as the number of cycles per centimetre of surface.
    • Infants and children at an early developmental level may not respond to stimuli placed at 57 cm distance. Their visual sphere may be limited to less than 30 cm (~ 1 ft). When the gratings are held at half the 57 cm distance, the number of cycles per degree (cpd) is half of that at 57 cm. If the infant''s response can be elicited only at 15 cm (~ 1/2 ft), 1/4 of the original distance, the frequency of the grating is 1/4 of the value printed on the test. If the child responds to the stimuli at about 1 meter (exactly 114 cm or ~ 4 ft), the grating acuity values are twice the value printed on the test.
    • In the examination of infants it is advisable to choose test distances that are parts or multiples of 57 cm, i.e. 28 cm, 43 cm, 85 cm or 115 cm. Longer distances are rarely used.
    • Infants at the age of 8-12 months may have had their immunisation injections and learned that unknown people can be friendly and nice for a while but then they stick. These infants look worried as long as the tester is within her arm''s length from the infant and relax when the measurement is made at 115 cm distance.
    • The 1 cpcm grating is placed at 57 cm and at 114 cm from the camera. At the 57 cm distance the grating is an 1cpd stimulus and at the 114 cm distance the same grating is a 2 cpd stimulus. The distance of 57 cm is derived from the formula 2 p r. A circle has 360degree and the circumference of a circle is equal to 2 p r (where r = the radius). In this case, "r" is equivalent to the distance between the child''s eye and the paddle. If the circumference of a circle measures 360 cm, then each degree of angle subtends to a distance of 1 cm on the circumference. The radius of such a circle, r, is then : r = 360 cm / 2 p = 57.2 cm.


    Additional Information:

    • Item Code: 253300

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    Heidi Expressions Face Test Good-Lite USA
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    Weight15g
    MaterialPaper
    UsageEye Testing
    ColorBlack/White
    Pack TypePacket
    Cards Per Set18
    Size4" x 4" (10.16 cm x 10.16 cm)

    Good-Lite USA
    Heidi Expressions Face Test (#254505)
    Some children with brain damage-related vision loss may achieve near normal results in routine vision tests (large visual field and normal or near normal visual acuity), but cannot interpret facial expressions or recognize people''s faces. The Heidi Expressions test game improves early evaluation of vision for communication.

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    Hiding Heidi Low Contrast Face Test
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    BrandGood-Lite USA
    MaterialPVC/Plastic
    Double SidedFour cards printed on both sides in the following contrast levels black,25%,10%,5%,2.5%,and 1.
    Single SidedSeven cards printed on one side in the following contrast levels black,25%,10%,5%,2.5%,and 1.2
    Card Size23x23 Cm
    ShapeSquare
    UsageEye Testing

     

    Good-Lite USA

    Hiding Heidi Low Contrast Face Test (#253500) 

    With sincerity and hard work of our professionals, we have carved a niche for ourselves in this domain by providing a premium quality gamut of Hiding Heidi Low Contrast Face Test.

    Other Details:

    • Visual communication is the most important communication method during the first year of life. The ability to detect objects of low contrast is an important component of the visual system. For example, facial expressions are mediated by faint shadows and changes in the contours of the mouth and eyes. Determining the levels of contrast that an infant can detect helps provide baseline data for evaluating future changes. For example, deviations from usual behavior may indicate disorders that leave vision at high-contrast levels unaffected.

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    LEA Rectangles
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    BrandGood Lite
    ColorBlack And White
    Weight20-50g
    UsageEye Testing
    Pack TypePacket

    Good-Lite USA

    LEA Rectangles Game (#254600)

    This educational toy is a modified version of the Effron rectangles and is used to assess size perception. The Rectangles Game contains two groups of rectangles. A child with normal vision can visually distinguish between a longer and a shorter rectangle often before the age of 3 years. The test is a play situation where the tester asks the child to place the grey rectangles on the black rectangles. You can observe the eye-hand coordination and whether the rectangles are placed on the correct one without hesitation. Test includes 5 black and 5 grey rectangles in 5 sizes and instructions.

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    LEA 3-D Puzzle - Good-Lite USA
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    BrandGood Lite USA
    UsageEye Testing
    ShapeSqaure
    Tray Size2" x 2" (5.1 cm x 5.1 cm)
    MaterialPlastic

    Product Details:
    The LEA 3-D Puzzle (# 251600) is designed for supporting the development of the concept of "same", first with colors, then with black & white concrete forms that are prerequisites for the measurement of recognition acuity with the LEA SYMBOLS tests at an early age. During the play you can also observe eye-hand coordination and awareness of directions, which are often problems for children with brain damage, even mild brain damage. Package includes the booklet: Assessing Vision Development Through Picture and Shapes and instructions.

    Additional Information:

    • Delivery Time: 2 Week

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    Cone Adaptation Test
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    MaterialPlastic
    Packaging TypePlastic
    BrandGood-Lite USA
    Weight200gm

    Good-Lite USA
    252900
    • The test consists of 15, 2" x 2" (5 cm x 5 cm) red, blue, and white plastic chips designed to help parents, teachers, and doctors assess childrens visual difficulties in twilight. 
    • The test situation is not a formal test of night vision, but gives useful information on visual adaptation to lighting changes.

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    LEA Flicker Wand
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    BrandGood-Lite
    Wand26.5 in
    Long with20 in
    Model no280000

    Good-Lite USA
    LEA Flicker Wand (#280000)

    • The LEA Flicker Wand is 26.5 in (67.3 cm) long with a 20 in (50.8 cm) flexible wand with a diode at the end that can be used as either a flickering or non-flickering stimulus at 4, 40 and 400 cd/m2. 
    • The curved wand is moved from behind the person forward in all four quadrants of the visual field to detect losses in the periphery of the visual field.


    Additional Information:

    • Item Code: 280000

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    • LEA Mailbox
    • LEA Mailbox
    LEA Mailbox
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    LEA Mailbox

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    Product Brochure Watch Video

    MaterialHDPE
    Usage/ApplicationAssess visual perception of line orientation
    Model Number254700
    Thickness5 mm

     

    Used to assess visual perception of line orientation. Tests two components:

    • Information for the hand movements in the parietal lobe and
    • Picture perception in the inferior temporal lobe.

    To observe the first function, the child is asked to drop a card through the slot of the LEA Mailbox Game. The child should demonstrate perception of the orientation of the slot by turning the card to the correct position before moving it half the distance to the slot (dorsal stream function). A ventral stream function can be observed through interactive play using the LEA Mailbox Game. If a child cannot visually perceive the orientations of lines, drawing them may be difficult, and drawing angles will make no sense. 

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