Standard Pediatric Low Vision Package

The Single Symbol Book is ideal for testing children and adults who have difficulties in the perception of symbols in lines. 

Features:

• Helps determine the best resolution of the visual pathway in a child/adult with amblyopia or impaired vision.
• Single optotype line sizes from 20/200 to 20/8 (6/60 to 6/2.4) equivalent. 

Benefits: 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. 

2508 Lea Card With Cord Features: 

• Proportionally-spaced 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.
• The attached 16-inch (40cm) cord ensures proper testing distance.
• The response key is printed on the test card.
• Includes flash cards and instructions. 8" x 10" (20.3 cm x 25.4 cm).
• Testing distance: 16 inches, 40 cm 

Pocket Lea Card (#2509) Features: 

• Designed for testing patients' visual acuity during rounds and in similar situations with a need for quick testing.
• Proportionally spaced (logMAR) lines on one side and tightly crowded lines (50% spacing) on the reverse side
• Line sizes from 20/400 to 20/10 (6/120 to 6/3) equivalent, 0.05 to 2.00.
• 3.75" x 6.25" (9.5 cm x 15.9 cm).

LEA Symbols Low Contrast Test 10M Features: 

• Test for quickly measuring low contrast visual acuity at 25%, 10%, 5%, 2.5%, and 1.25% contrast by measuring the distance at which the symbols are seen. 
• 10M symbols correspond to visual acutiy 0.10 at 1 meter, 0.05 at 0.5 meters, and 0.03 at 0.3 meters- makes VA values asy to calculate.
• Includes a table for conversion to Snellen equivalent VA values. 
• Includes a response key and 5 pages. 
• Dimensions: 3.25" x 9" (8.25 cm x 22.9 cm)

LEA 3-D Puzzle Features: 

• Designed to support the development of the concept of "same", first with colors, then with black and whiteconcrete forms that are prerequisites for the measurement of recognition acutiy with LEA Symbols tests at an early age. 
• During play, you can also observe hand-eye coordination and awareness of direction which are often problems for children with brain damage, even mild brain damage. 
• Includes the booklet: Assessing Vision Development Through Picture and Shapes and instructions. 
• Dimensions: Tray 6.75 " x 6.75" (17.2 cm x 17.2 cm) 
• Dimensions: Symbol puzzle pieces 2" x 2" (5.1 cm x 5.1 cm)

LEA Gratings A Preferential Looking Test Features: 

• Designed for preferenial looking test situations with infants or children and adults with disabilities to determine detection acuity. 
• Grating levels printed on each handle are: 0.25, 0.5, 1.0, 2.0, 4.0, and 8.0 cpcm (cycles per centimeter of surface)
• Includes instructions, storage case, and 4 paddles. 
• Dimensions: 7.75" x 12.5" (19.685 cm x 31.75 cm)

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. Instructions are included.

Hiding Heidi Low Contrast Face Test Features: 

• Single sidedcards- includes seven cards printed on one side in contrast levels: black, 25%, 10%, 5%, 2.5%, and 1.25%. 

LEA Symbols Chart Features: 

• Designed for testing chiledren and adults with visual impairment at a distance of one meter. 
• 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. 
• 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. 
• Dimensions: 16" x 21.5" (40.7 cm x 54.6 cm)
• Folds: 16" x 10.75" (40.7 c, x 27.3 cm)
• Testing Distance: 40"/1 Meter

LEA Numbers Chart Features:

• Designed for testing chiledren and adults with visual impairment at a distance of one meter. 
• 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. 
• 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. 
• Dimensions: 16" x 21.5" (40.7 cm x 54.6 cm)
• Folds: 16" x 10.75" (40.7 c, x 27.3 cm)
• Testing Distance: 40"/1 Meter

LEA SYMBOLS Pocket Box Stick Features: 

• The LEA SYMBOLS Pocket Box Stick shows 20/125, 20/100, 20/80, 20/60, 20/50, 20/40, 20/30, and 20/20 lines.
• Each stick is 9/16" (1.4 cm) square and 4.5" (11.5 cm) long with fixation targets on each end.
• Testing distance: 16 inch, 40 cm 

LEA Symbols Low Vision Book Features: 

• Top bound low vision book with LEA Symbols pediatric optotypes 
• Designed for testing severely visually impaired children and adults. 
• Distance testing line sizes range from 20/1600 to 20/16 equivalent.
• Near vision testing line sizes range from 20/800 to 20/16 equivalent. 
• Testing Distance: 10 feet (3 Meters), 5 feet (1.5 meters), and 16" (40 cm).
• Includes: Booklet, slip-up occluders glasses for children, and metal frame occulder glasses

Low Vision Chart Stand Features: 

• Provide a convenient way to display LEA Numbers and Symbols Low Vision Charts (bound from the top). 
• No more propping the charts up on a chair- changing out from Numbers to Symbols is easy and quick.
• 10" (27 cm) base and takes the top of the chart from 48" to 76" (123 cm to 194 cm).