Visionstar SW-6000

Placido Cone with 31 Rings

The measuring method is a Placido cone carrying 31 rings. Projecting a dense ring pattern is what allows the software to read curvature from the way the reflection distorts.

7936 Measurement Points

A total of 7936 points is sampled across the cornea. Dense sampling is what separates a smooth astigmatic surface from a genuinely irregular one on the resulting map.

Coverage of 10.91mm Diameter

Measurement coverage is stated at 10.91mm in diameter, which takes the map well beyond the central optical zone and out toward the periphery where irregularity often first appears.

Curvature and Dioptre Range

Curvature radius is listed from 5.5mm to 10.0mm and the dioptre range from 33.75D to 61.36D, a span that reaches both the steep and the flat ends of what a clinic encounters.

Precision of 0.02mm

Stated precision is plus or minus 0.02mm. Repeatability at that level is what makes comparison between visits meaningful when a clinician is watching for change.

Five Map Displays

Axial curvature, tangential curvature, elevation, imitated keratoscope and three dimensional cornea maps are all listed, with curvature shown either as data or through colour.

Named Clinical Functions

A cornea contact lens fitting function and a keratoconus detecting function are both listed as present on the instrument rather than offered as separate additions.

Patient Alignment and Output

Adjustment covers 86mm left to right, 40mm forward and backward and 30mm up and down, with 5mm of chinrest travel. Image output goes to a high quality colour inkjet printer.

Corneal Astigmatism and Shape Analysis

The manufacturer describes the software as supporting clinical diagnosis of corneal astigmatism and quantitative analysis of corneal shape. With 7936 points sampled across a 10.91mm diameter, the map distinguishes regular astigmatism from an irregular surface, and the choice between axial and tangential curvature lets a clinician look either at the overall optical effect or at localised change. Presenting curvature in colour makes the pattern legible at a glance during a busy clinic.

Refractive Surgery Planning and Review

Use in preoperative examination and postoperative effect evaluation of corneal refractive surgery is listed directly. Before surgery the elevation and curvature maps contribute to candidacy assessment, and the keratoconus detecting function bears on that decision. Afterwards the same maps document what the procedure achieved. Because precision is stated at plus or minus 0.02mm, comparison across those two points carries weight.

Contact Lens Fitting

A cornea contact lens fitting function is listed as present, and the manufacturer describes guiding contact lens wear to improve the accuracy of lens adaptation. An imitated keratoscope map and a simulated lens view help a practitioner reason about how a rigid lens will sit on a particular surface, which shortens the trial and adjustment cycle for the patient and the practice alike.

Keratoconus Screening

A keratoconus detecting function is listed as present. Screening rests on recognising a pattern of steepening and elevation that a dense sample across a wide diameter is well placed to reveal, particularly when the change is peripheral or early. For practices seeing young patients with shifting prescriptions, having that analysis available in house shapes how quickly a suspicion turns into a referral.

Dense Sampling Across a Wide Diameter

Thirty one rings producing 7936 points across a 10.91mm diameter gives the software a great deal to work with. The practical consequence is confidence in the periphery, where a sparse sample leaves gaps that get filled by interpolation rather than measurement. When the clinical question is whether a surface is genuinely irregular, the density of the underlying sample is what decides whether the answer can be trusted.

Maps Chosen to Suit the Question

Five display options mean the clinician picks the view that answers the question in front of them. Axial curvature suits the overall optical picture, tangential curvature localises change, elevation describes the surface itself, the keratoscope view supports lens reasoning and the three dimensional map explains a finding to a patient. Colour or numerical presentation then adapts the same capture to either a clinical judgement or a conversation.

Positioning and Records Handled Practically

Adjustment of 86mm left to right, 40mm forward and backward, 30mm up and down and 5mm of chinrest travel covers the ordinary range of patients without a struggle at the instrument. Output to a colour printer then puts a map into the notes or into the patient's hands. Small things, but they decide whether a capable instrument gets used routinely or only when someone has the time to set it up carefully.

The Visionstar SW-6000 is a Placido cone instrument built around dense sampling and clear presentation. Thirty one rings produce 7936 measurement points across a 10.91mm diameter, curvature radius is covered from 5.5mm to 10.0mm and the dioptre range from 33.75D to 61.36D, with precision stated at plus or minus 0.02mm. Axial curvature, tangential curvature, elevation, imitated keratoscope and three dimensional maps present the result as data or as colour, and contact lens fitting and keratoconus detecting functions are both listed as present.

This page states what the technical data states. Housing dimensions, mass, electrical supply, software version, the computer and monitor arrangement, configuration and condition do not appear on the material held, and nothing here should be read as a claim about testing or regulatory approval. Medigear.uk will confirm those points along with the full model designation.

If your practice fits rigid lenses, screens for keratoconus or works alongside a refractive surgery service, and you want the specification checked against the patients you actually see, speak to Medigear.uk. As a verified medical equipment supplier working across medical, dental, rehabilitation and aquatic therapy settings, the team will confirm what this instrument offers and help you judge whether it earns a place in your consulting room.