A lens with several near-power support steps, focused on reading and near tasks, with personalisation as specified for the product.
Application and design rationale
Six steps of near-power support
Steps of 0.25, 0.50, 0.75, 1.00, 1.25 and 1.50 D are specified. Do not select them without assessing accommodation and prescription.
| Design identifier | Description |
|---|---|
| Category | Advanced anti-fatigue lens with reading-power support |
| Design type | Power Boost Equipped Lens |
Technical specifications
Orderable options depend on prescription, material and current product availability.
| Technical parameter | Value / status |
|---|---|
| Product classMarket Segment | High-end Anti-Fatigue |
| Design typeDesign Type | Power Boost Equipped Lens |
| Available materialsAllowed Materials | All materials |
| Pre-calibrationPrecalibration | Yes |
| PersonalisationPersonalization | Yes (full personalisation) |
| Prism reference pointPrism Ref. Point (PRP) | Geometrical Center |
| Distance reference pointDistance Ref. Point (DRP) | +10 mm |
| Fitting reference pointLayout Reference Point (LRP) | +4 mm |
| InsetInset | 0–4 mm (Core Inset) |
| Near reference pointNRP | 18 mm |
| Power-boost stepsPower Boost / Addition | 0.25, 0.50, 0.75, 1.00, 1.25, 1.50 dpt |
| PRP decentration range | 0 to 15 mm |
| Specified indices and options | Refractive indices 1.50, 1.53, 1.60, 1.67 and 1.74; confirm final availability when ordering. |
Design mechanism and features
Near-power support in six steps
ReadMax is a Power Boost Equipped Lens with six values: 0.25, 0.50, 0.75, 1.00, 1.25 and 1.50 D. Its lower-lens support zone addresses near work; a practitioner determines the appropriate value.
18 mm corridor
The document describes 18 mm NRP and boost range as supporting a gradual power transition. This does not guarantee elimination of all swim effects or fatigue.
Personalisation inputs
ReadMax's document identifies DuraTrace and DuraTrack eye/head movement data. Frame position and behavioural data inform personalisation; Core Inset is specified as 0–4 mm.
Technologies in this design
- DuraTrace
- Ray-tracing calculations and optical-aberration optimisation in surface design.
- DuraTrack
- Viewing-behaviour inputs and the ratio of eye to head movement, as described for this model.
- Core Inset
- Standard automatic inset for near-zone positioning, as specified in the product table.
Measure before manufacture
Required parameters vary by design and must be recorded by a professional.
- Monocular PD
- Each eye's pupillary distance is recorded separately to align horizontal lens positioning with the visual axis.
- Fitting Height
- Fitting height is recorded on the adjusted frame in the natural position of wear; the required near zone must also fit within the frame.
- BVD
- Distance from the rear lens surface to the corneal apex; relevant to power-compensation calculations in personalised models.
- Pantoscopic Angle
- The frame's vertical tilt in the position of wear must be measured; example values are not substitutes for measurement.
- Wrap Angle
- The horizontal curvature of the frame relative to the face, describing lens positioning.
- Box A
- Horizontal width of the frame opening in the boxing system.
- Box B
- Vertical height of the frame opening in the boxing system.
- DBL
- Distance between the two lens boxes at the frame bridge.
- ED
- Effective diameter: twice the greatest distance from the boxing centre to the lens-shape edge, used for blank selection and edging calculations.
Design-specific inputs
- Eye-Shuttle Kinematics: adapting power distribution to the head-to-eye movement ratio measured with the Eye-Shuttle headset.
- Core Inset (0–4 mm): standard displacement of the boost focus according to reading distance.
Monocular pupillary distance
For aligning the lens centre with each eye's visual axis.
Fitting height
Vertical pupil position relative to the frame in the position of wear.
Back vertex distance
One of the inputs describing the actual position of wear.
These are basic fitting parameters; additional inputs and the level of personalisation are specified for each model.
Complete parameter guide ↖View the original catalogue page
