Description
The Stereo Optical SL002 Randot® Stereotest with LEA Symbols is designed to evaluate stereoscopic depth perception in pediatric and adult patients. Its random-dot technology helps minimize monocular clues, requiring both eyes to work together to identify figures that appear in depth.
The test combines three complementary sections. Random-dot forms assess gross stereopsis at 500 and 250 seconds of arc. The LEA Symbols section uses the familiar apple, square, house and circle to facilitate testing of young children at 400, 200 and 100 seconds of arc.
For more precise measurement, the graded-circle section evaluates fine stereoacuity across ten levels ranging from 400 to 20 seconds of arc. In each target, the patient identifies which of three circles appears to project forward.
The test is standardized for administration at 16 inches or approximately 40 cm. Polarized 3-D viewers must be worn during testing, including over prescription glasses when necessary. Its portable booklet format makes it suitable for optometry, ophthalmology, pediatric vision screening and binocular-vision assessment.
Key Features
- Evaluates gross stereopsis and fine stereoacuity
- Uses random-dot backgrounds to reduce monocular clues
- Gross Randot forms at 500 and 250 seconds of arc
- Child-friendly LEA Symbols at 400, 200 and 100 seconds of arc
- Uses the apple, square, house and circle LEA Symbols
- Ten-level graded-circle test from 400 to 20 seconds of arc
- Includes a binocular suppression check
- Suitable for pediatric and adult patients
- Standard testing distance of 16 in / approximately 40 cm
- Includes one pair of standard polarized 3-D viewers
- Answer key printed on the back cover
- Portable booklet for clinical use
Additional Information
- Product type: Near stereopsis and stereoacuity test
- SKU / Part number: SL002
- Model: Randot® Including LEA Symbols
- Test technology: Polarized random-dot stereograms
- Test sections: Randot forms, LEA Symbols and graded circles
- Functions evaluated: Gross stereopsis, fine stereoacuity, binocular fusion and suppression
- Randot form levels: 500 and 250 seconds of arc
- LEA Symbols levels: 400, 200 and 100 seconds of arc
- LEA Symbols used: Apple, square, house and circle
- Graded-circle range: 400–20 seconds of arc
- Number of circle levels: 10
- Circle levels: 400, 200, 140, 100, 70, 50, 40, 30, 25 and 20 seconds of arc
- Circle-test format: Three-circle multiple choice
- Testing distance: 16 in / approximately 40 cm
- Viewing method: Polarized 3-D viewers
- Suppression check: Included
- Target population: Pediatric and adult patients
- Answer key: Printed on the back cover
- Manufacturer: Stereo Optical Company, Inc.
What’s Included
- Randot® Stereotest with LEA Symbols booklet
- Randot gross-stereopsis forms
- Three-level LEA Symbols test
- Ten-level graded-circle test
- One pair of standard polarized 3-D viewers
- Answer key on the back cover
- Administration and scoring instructions
Cleaning and Care
Gently clean and disinfect the stereotest and 3-D viewers with disinfectant wipes or a soft, slightly damp, lint-free cloth using 70% isopropyl alcohol. Never spray alcohol or other liquids directly onto the surfaces.
Keep the booklet upright during testing and avoid folding it. Store it in a cool, dry place away from excessive heat and humidity, which may cause the polarized images to fade.
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