Visionstar LM-700

Distribution Measurement

A distribution measurement presents the degree distribution of the lens, describing power across the surface rather than only at one single measured position on it.

Hundreds of Measuring Points

The manufacturer describes measurement based on Hartmann theory using hundreds of measuring points, which is reported here as the manufacturer's own account of it.

Spherical and Cylindrical Range

Spherical degree runs minus 25 to plus 25, with cylindrical degree and the under plus degree each spanning minus 9.99 to plus 9.99 across the whole stated range.

Full Prism Specification

The prism basal angle sweeps 0 to 360 degrees, with prism degree reaching 15 in the horizontal direction and 20 in the vertical direction of the measurement.

Pupillary Distance and Height

Pupillary distance is measured from 30 to 100mm and pupillary height from 4 to 55mm, with an electronic pupillary distance ruler also described.

Wide Lens Acceptance

Lens size is accepted from 7 to 110mm, which covers small rimless lenses at one end and uncut blanks at the other end of that stated range.

Two Dimensional Code Printing

An integrated printer produces a two dimensional code, with the manufacturer relating the integration to easier replacement of the printing papers when a roll runs out.

Eye Recognition and Display

Automatic recognition of the right and left eye is described, alongside a tilting screen, LED indication of the start switch and ultraviolet transmittance measurement.

Progressive and Multifocal Dispensing

This is precisely where distribution measurement earns its place. A progressive lens has no single power to quote, so mapping the whole surface describes what a wearer will actually experience along the corridor, where a single point reading describes only whichever spot the operator happened to choose. For a practice dispensing progressives regularly, that is a materially better picture of what the laboratory has actually supplied against the order.

Prism Verification

A basal angle across the full 360 degrees, with 15 horizontally and 20 vertically, covers prismatic prescriptions that any narrower instrument would simply refuse. Orientation matters quite as much as magnitude does with prism, and so an instrument recording the basal angle through a complete circle removes any ambiguity at all about how a correction has actually been worked into a finished lens.

Dispensing Benches Recording Fitting Heights

Pupillary height from 4 to 55mm alongside pupillary distance from 30 to 100mm covers the fitting measurements a progressive dispense actually depends upon in the first place. Taking both from the same instrument as the power means the whole dispensing record comes from one single source, rather than being assembled from a rule, a marker pen and some separate reading afterwards from memory.

Practices Passing Records Onward

Printing a two dimensional code alongside the measurement lets a record be carried into another system without being typed in all over again. For any practice moving figures between a consulting room, a glazing bench and a management system, that removes the transcription step where errors most commonly enter into a record of the work.

A Map Rather Than a Sample

Reading a lens at hundreds of separate points and presenting the distribution is a quite different proposition from quoting one figure. For plain single vision work the two will agree; for progressives, varifocals and anything with a corridor they do not, and the map is the honest description. Any practice that dispenses those lenses is buying information ann ordinary lensmeter simply cannot supply, at any price at all.

Prism Properly Specified

A full 360 degree basal angle with 15 horizontal and 20 vertical is a generous prism specification indeed to have, and prism is where the narrower instruments most often run out entirely. For any practice handling prismatic prescriptions, an instrument that records both the magnitude and the orientation right across a complete circle is what makes a verification conclusive rather than merely approximate at the bench.

The Record Leaves in a Readable Form

A printed two dimensional code turns a measurement into something that a system can ingest directly. Every manual transfer of a figure is another opportunity for a digit to change, and in dispensing work a changed digit becomes a lens that is subtly wrong and yet passes inspection. Removing the retyping removes that whole failure mode rather than merely guarding against it after the event has happened.

The Visionstar LM-700 reads spherical degree from minus 25 to plus 25, with cylindrical degree and the under plus degree each from minus 9.99 to plus 9.99, and axis for astigmatism across 0 to 180 degrees. The prism basal angle sweeps 0 to 360 degrees, with prism degree reaching 15 horizontally and 20 vertically. Lens size is accepted from 7 to 110mm, pupillary distance from 30 to 100mm and pupillary height from 4 to 55mm, and ultraviolet transmittance measurement is provided. A distribution measurement presents the degree distribution of the lens, automatic recognition of right and left eye is described, and an integrated printer produces a two dimensional code.

Two points are handled deliberately. The lens thickness row is printed as greater than or equal to 20mm, which read literally would exclude every spectacle lens, so that row should be corrected at source. And the Hartmann theory description is the manufacturer's own account of the measuring principle, reported here rather than endorsed. No electrical supply specification, dimensions or weight appear on the material held.

If your practice dispenses progressive lenses, verifies prismatic prescriptions, or wants dispensing records passed on without retyping, speak to Medigear.uk. As a verified medical equipment supplier working across medical, dental, rehabilitation and aquatic therapy settings, the team will confirm the full configuration.