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JVECRG Eccentric Circles Red Green 1 Pair Clear
Central anti-suppression check. The word FUSE is only seen by one eye, the word TEXT is seen by the other eye, and the word THIS is seen by both eyes.
₹500.00
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Product description
- Central anti-suppression check. The word FUSE is only seen by one eye, the word TEXT is seen by the other eye, and the word THIS is seen by both eyes.
- Fixation disparity check. Small hash mark on the left of the outer ring on one card, and on the right of the ring on the opposite card to help improve accurate alignment and help reduce fixation disparity.
- Convergence and divergence training when red/green glasses are used. Ex. If the green card is on the right and the green filter is over the left, divergence is done when fusing the two images.
| Topic | Discription |
| Purpose | A central anti‑suppression / fusion check and fixation disparity / alignment / vergence training tool under red/green dichoptic conditions. The “Red/Green” version is specially used in conjunction with red/green filters to enforce monocular separation and force vergence training. |
| Target users | Optometrists, orthoptists, vision therapists, and their patients. It is not a screening chart for general public but a tool for binocular vision / therapy work. |
| Optotypes / Symbols | Concentric circles (eccentric circles) printed on each card Central text: “FUSE” seen by one eye, “TEXT” seen by the other eye, and “THIS” seen by both eyes (in fused view) Hash / alignment marks: a small hash mark on left side of outer ring on one card, and on right on the matching card -These features allow anti‑suppression testing and fine alignment judgments. |
| Scaling / Spacing | The circles are fixed in size (not graded in multiple sizes) The cards are clear and can be shifted horizontally relative to each other to introduce disparity (i.e. varying spacing) In a red/green setup, the disparity is controlled by card offset rather than graduated sizes There is no published graduated scale (in mm or prism) for the offsets in the listing I saw. |
| Range of Acuity / Line Sizes | Not applicable (or low relevance) because this is not a visual acuity chart with multiple lines. Its function is binocular fusion / suppression, not measuring high/low acuity levels. The circles are of fixed size as printed, not graded in many line sizes. |
| Testing Distance | Near / free‑space (cards held in front of patient) Meant for near fusion training using red/green filters; not designed for far chart distance. |
| Dimensions | One general variant: the “Eccentric Circles” product is described as two 6″ × 7″ clear acetate cards. |
| Mounting | Free‑space, handheld / clinician‑held — cards are not wall mounted or framed. The product is designed for binocular free‑space fusion, not mounted charts. |
| Features | Anti‑suppression central check via differential words (“FUSE” / “TEXT” / “THIS”) Fixation disparity alignment: with hash marks to detect fine misalignments Vergence training (convergence / divergence) when used with red/green glasses. For example: if green card is on right and green filter is over the left, divergence occurs while fusing. |
| Accessories | The listing shows just the pair of clear red/green eccentric circle cards (i.e. one pair). No extra accessories (frames, stands, filters) are explicitly included in that listing. |
| Durability / Material Qualities | Material: clear plastic / clear acrylic (clear plastic “clear” version as opposed to opaque) Because the listing emphasizes “clear plastic” version, the cards are likely made from durable plastic sheet rather than paper. Durability is moderate: plastic offers good resistance to bending and moisture compared to paper, but repeated use may cause scratching, edge wear, or loss of print clarity over time. |
| Usability / Marker of Quality | Straightforward to use in a binocular therapy session (with red/green filters) The incorporated anti‑suppression text, hash marks, and compatibility with convergence/divergence tasks are markers of a well‑designed, clinically useful tool Because Good‑Lite is a known brand in vision‑testing/therapy equipment, that gives credibility The dual‑word / partial overlap design (words visible to different eyes) adds sophistication beyond a simple circle pair Limitations: absence of published offset scale or calibration, and lack of protective casing may reduce long‐term precision The presence of features like differential words for suppression check and hash marks for precise alignment distinguishes it from simpler circle pairs, indicating a higher “quality / clinical grade” design. |
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