Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
Product description
- JJUTRON VISION is a 100% Indian company that has been supplying ophthalmic diagnostic & surgical supplies and equipment to optometrists, Ophthalmologist, Hospitals and Clinics across India for over 19 years. JUTRON unique product mix provides ophthalmologists with comprehensive range of innovative products and wide-range of selection options that few competitors can provide. Jutron Vision delivers wide range of high quality ophthalmic diagnostic products and is committed to deliver innovative and functional products at affordable prices.
| Topic | Discription |
| Purpose | To help patients develop accommodative facility / control (i.e. ability to shift focus between distances) by using a distance chart and a transparent near card together. |
| Target users | Useful in vision therapy, home exercises for accommodative dysfunction, emerging presbyopia. The “Z‑axis” concept isolates the focusing (accommodation) axis, independent of eye movements (x/y), allowing the patient to see one plane come into focus and the other blur. |
| Optotypes / Symbols | Standard optotypes (letters / characters) as used in distance / near charts The listings do not specify the exact font set or symbol types, but since they are “distance charts” for accommodation training, they presumably use conventional letter optotypes. |
| Scaling / Spacing | Conventional letter size progression / spacing as in a standard distance chart, not specially graduated for the “rock” function The rock function is achieved by overlapping near card + distance chart, not by varying scale on the same chart. The spec documents do not describe special scaling steps for the rock set. |
| Testing Distance | Distance chart: typical distance chart distance (e.g. a room wall) The effect is obtained by stacking a transparent near card in front of the distance chart. The near card is very close; the patient must shift accommodation between the two overlapping planes. |
| Mounting | The distance chart is intended to be wall / poster displayed (as a “distance chart”) The idea is that the distance chart is fixed in place and the near transparent card is placed directly in front of it. |
| Features | The “rocking” function: ability to shift focus (accommodation) between the near card and distance chart. Provided patient instructions are included. The kit may include both distance and near chart in one set (“distance and near chart”) in some versions. The product emphasizes the experiential understanding of accommodation by allowing the overlapping blur / focus effect. |
| Accessories | The product includes the distance chart and transparent near card / near chart in the set. Patient instructions are included. Some versions are “chart only” or “kit incl charts.” |
| Durability / Material Qualities | The “paper” version is made of paper charts (paper distance chart) in at least one variant. The paper version may be more susceptible to wear, creasing, fading. The styrene / plastic version offers better durability. The spec pages do not mention coating, lamination, finish, or thickness. |
| Usability / Marker of Quality | The concept of the Z‑axis rock chart is pedagogically strong: isolating accommodation helps patients understand and train focusing independent of eye movements. Inclusion of both distance + near transparent overlay is a proper implementation of the rock principle. The fact that the product is offered by established vision therapy suppliers (Good‑Lite / Jutron) gives it credibility. The inclusion of instructions (for patients) is a usability plus. A “styrene version” suggests recognition of durability needs, which is a marker of quality design. However, limitations: absence of published details like exact dimensions, acuity ranges, material specs, and scaling parameters reduce transparency for clinicians who want to compare or calibrate precisely. Without protection (framings, lamination) the paper version may degrade, reducing long-term precision. |
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