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Random Dot 2 Stereopsis Test Standard
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Random Dot 2 Stereopsis Test Standard

Stereo depth perception tests are an effective and easy to use method of screening stereoscopic vision for all ages. They help to detect visual problems such as stereopsis, amblyopia, suppression and strabismus.

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Description

Plastic

Beads

Nylon

String

Beads

wood

Therapeutic

heavier cords

The Original Stereo Fly

  • The Stereo Fly has proven to be an effective and easy-to-use method of screening vision for all ages. They help to identify vision problems and conduct stereopsis, amblyopia, suppression, and strabismus testing, each of which can impede development and performance.
  • Evaluate both gross stereopsis (355 to 700 seconds of arc) and fine depth perception
  • Graded circle test (800 to 40 seconds of arc)
  • Animal test for children (400 to 100 seconds of arc)

Butterfly Stereotest

  • The Stereo Butterfly tests and evaluates random dot stereo depth perception for both gross stereopsis (2500 to 1200 seconds of arc) and fine depth perception. Unlike it’s predecessor, the Stereo Fly Test, the Butterfly Stereotest figures presented on the test cannot be identified without viewing glasses.
  • Graded circle test (800 to 40 seconds of arc)
  • Animal test for children (400 to 100 seconds of arc)

TopicDiscription
CatagoryStereo Acuity Test
Materialpaper weight, plastic type, etc.
How to use forHelps detect lazy eye (amblyopia) and eye alignment problems (strabismus), even in small kids or non-verbal patients.
Includes Special Glasses ,
Answer Key Included		Comes with both kids’ and adults’ polarized glasses needed to take the test properly.
PurposeTo check if a person can see in 3D (depth perception) and to help find vision problems like lazy eye or eye misalignment.
DurabilityPaper / card can wear at the edges, get bent, dog‑ears, etc.
Polarized film can scratch, lose polarization if bent, exposed to high heat or close to strong light sources
Purpose / Use-CaseUsed to rapidly test for amblyopia and strabismus, particularly useful with early non-readers and non-verbal children, as well as adults. It assesses stereoacuity (depth perception) via random dot shapes and graded circles.
Stereoacuity Levels / Disparity RangeRandom Dot Shapes at 500, 250, and 125 seconds of arc disparities, Graded Circle test down to 12.5 seconds of arc for fine stereo discriminatio, In the “Shapes” portion, there are also shapes shown at intermediate disparity levels (e.g. 63 seconds arc in some editions) depending on version.
No Monocular CluesThe test is designed with technology so that monocular clues are eliminated. This prevents a subject with vision in only one eye from “guessing” based on clues not requiring binocular vision
Test Components / FormatComes as a booklet with imprinted matching shapes/images inside the cover for matching tasks. Includes adult and pediatric polarized viewers so it can be used across different age groups. Includes answer key on back cover; also a manual.
Material / Build QualityThe booklet is built with improved / durable materials (though exact substrate isn’t always specified). The construction is designed to withstand handling in clinics with children. Viewers (polarized glasses) are part of the test package; these must be of good quality polarization
USP / What Sets It ApartVery fine stereoacuity measurement (as low as 12.5 arc seconds) with no monocular cues. Versatility: works for children (non-verbal) and adults, with both matching-shapes and circle tasks.
Ease of Use / AdministrationMatching shapes / matching tasks make it easier for children who can’t read letters. The test is relatively rapid — suitable for screening.
Durability / Care IssuesBooklet should be handled carefully; avoid bending pages sharply, and protect from extremes (temperature) to avoid damage. (Standard for similar stereo booklets) — while not always explicitly spelled out for this version, typical care instructions are given with similar tests. Polarized viewers should be kept clean and undamaged for correct performance
Testing Conditions / RequirementsRequires polarized viewers/glasses for binocular separation. Needs proper lighting and viewing distance (usually near distance; matching distance for test performance).
Limitations / Things to NoteVery fine disparities (e.g. 12.5 seconds) may be beyond many patients with binocular vision disorders; expectation setting is important, Test performance depends on cooperation (especially in children) and correct use of viewers.

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