Description
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Product description
- The Stereo Fly Test – Standard is a near-vision booklet used with polarized glasses to check whether both eyes work together to see true 3D (depth). Patients first view a large fly whose wings should appear to “lift” off the page if basic (gross) stereopsis is present; then they move to animal pictures and graded circles that measure finer levels of depth perception. It’s quick (a few minutes), intuitive even for non-readers (just point to what looks raised), and useful for spotting potential eye-teaming problems such as amblyopia (lazy eye) or strabismus that may warrant a full exam.
- Includes: Booklet + polarized glasses
- Use distance: About 40 cm (16 in) in normal room light
- What it measures: Gross stereopsis (fly) and fine stereo (animals & graded circles, typically down to ~40 arcsec)
- Who it suits: Children and adults; great for clinics, screenings, and quick checks
- Why it’s effective: Highly engaging “pop-out” images make cooperation easy, especially for young children
- Note: This is a contour stereotest (not random-dot), so minor one-eye clues can exist; many clinics pair it with a random-dot test for confirmation
| Topic | Discription |
| Material | Vinyl material |
| Purpose | Stereopsis test combining both fly and shapes designed to rapidly screen/test for amblyopia & strabismus |
| Used | Pediatric ophthalmology, to test for conditions like amblyopia (“lazy eye”) and strabismus (misalignment of eyes) |
| Stereo acuity range (disparity) | From gross stereopsis 2500 seconds of arc down to fine stereopsis 20 seconds of arc |
| Graded circle test range | From 800 seconds of arc down to 20 seconds of arc |
| Durability | Paper / 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 |
| Monocular clues | Designed with no monocular clues (so that test cannot be “cheated” by one eye) |
| Includes | Polarized viewers (glasses) |
| Answer key | On back cover of booklet |
| Booklet design | Improved booklets (new version) |
| weight | 0.20 kg. |
| Stereo Fly Test | Standard is a stereopsis / stereo acuity test. |
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