Description
Plastic
Beads
Nylon
String
Beads
wood
Therapeutic
heavier cords
Product description
- Detection of Deviation: The patient fixates on a point of white light while the red Maddox lens (SKU: JVMLR) is placed in front of one eye (typically the right eye). The patient will see a red line (the streak) and a white light (seen by the other eye). The position of the red line relative to the white light indicates whether an ocular misalignment (phoria or tropia) is present.
- Measurement of Deviation: If the eyes are misaligned, the red line will not pass through the white light. Prisms are then introduced into the trial frame until the patient reports that the streak of light passes directly through the white light. The strength of the prism required indicates the degree of the eye deviation.
| Topic | Discription |
| Purpose / Target Users | This red Maddox lens is likely used in binocular vision/orthoptic testing (e.g., assessing ocular alignment, heterophoria/heterotropia) rather than standard acuity testing. Target users: optometrists, orthoptists, ophthalmologists. |
| Optotypes / Symbols | There is no clear description of what the visual stimulus looks like (a line, bars, streaks, printed symbols) for this lens. |
| Scaling / Spacing | No data on spacing of bars/lines, width of the streak, or calibration of deviation. |
| Range of Acuity / Line Sizes | Because this is an alignment lens not primarily an acuity test lens, these specs are not stated. |
| Testing Distance | The manufacturer does not specify the recommended viewing distance (e.g., near vs distance) for use of this lens. |
| Physical Size & Portability | While a “standard 38 mm lens size” is likely, the exact outer diameter, clear aperture, thickness of the lens, and rim specifications are not given. |
| Mounting / Display Features | The exact mounting ring included (if any), handle, orientation marking, rim colour coding etc are not specified. |
| Included Accessories / Extras | No mention whether the lens comes with a case, cleaning cloth, or trial frame mount/ring as part of the package. |
| Durability / Material Qualities | The material (optical glass vs acrylic), coatings (e.g., anti‑scratch, AR), rim material and finish, and expected lifespan or warranty are not specified. |
| Usability / Marker of Quality | While likely professional grade, no explicit certifications (e.g., CE mark, ISO standard) or optical tolerance specs (distortion, alignment accuracy) are provided. |
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