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JCC2 Jackson Cross
The JCC is a specialized lens used in subjective refraction to fine-tune the cylindrical axis and power of a patient’s prescription. The technique is also known as the “flip cylinder technique” because the clinician rapidly flips the lens between two positions, asking the patient which view is clearer.
₹500.00
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Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
Product description
- Detecting astigmatism: Confirming the presence and general orientation of astigmatism.
- Refining the axis: Determining the exact angle (axis) at which the cylindrical lens should be placed for optimal vision.
| Topic | Discription |
| Purpose / Target Users | The set is intended for use in refraction/optometry — specifically for determining astigmatism correction (orientation/axis) and refining cylindrical lens power. The listing says “Jackson Cross Cylinders … used to determine the orientation and power of the astigmatism correction and the axis.” |
| Optotypes / Symbols | Not applicable (since this is a lens set rather than an optotype chart) and not specified. |
| Scaling / Spacing | Not provided (no spacing between symbols, etc, as these are lenses, not charts). |
| Range of Acuity / Line Sizes | Not applicable/ not provided — the product is for astigmatism/refraction, not for line‑size acuity measurement. |
| Testing Distance | No specific recommended working distance is given in the listing. |
| Physical Size & Portability | For a similar single JCC product listing by the same vendor: “The lenses are 35 mm with axis markings and a handle that is 70 mm long.” While this dimension is for a single instrument, it gives a ball‑park size of lens diameter + handle length. |
| Mounting / Display Features | Apart from “metal box”, there is no detail on stand/mount/display features for usage. |
| Included Accessories / Extras | According to the listing: “Jackson Cross Cylinders in a metal box with 0.25 & 0.50 lenses.” So the set includes two cross‑cylinder lenses (0.25D & 0.50D) in a metal box/case. |
| Durability / Material Qualities | The listing is minimal: simply “in a metal box” but details like lens material (glass vs plastic), handle construction, protective features, lifetime are not given. |
| Usability / Marker of Quality | There is no attached manual or workflow description in the listing; no independent certification or standard mentioned. |
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