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ENT, Ophthalmic & Sensory
Visionstar JS-700A

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Visionstar ENT, Ophthalmic & Sensory

Visionstar JS-700A

Weak lenses read as carefully as strong ones

The Visionstar JS-700A low degree measuring lensmeter reads sphere from minus 25.00 to plus 25.00D with 0.01D resolution, claims accuracy on lenses below 0.12D, displays pupil height on screen and measures contact lenses down to 5mm in diameter. Medigear.uk confirms the full configuration on request.

Sections

Lensmeters

Categories

ENT, Ophthalmic & Sensory

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

The Visionstar JS-700A is an automatic lensmeter designed for the low end of the range, where small errors do the most damage. Sphere reads from minus 25.00 to plus 25.00 dioptres at 0.01D resolution, covering the full clinical span from the mildest reading correction to high-power work. Still, the instrument's particular claim is accuracy on lenses below 0.12D — the near-plano territory where a coarser meter rounds to zero and a genuine residual power goes unrecorded. That matters for verifying low-cylinder prescriptions where a wearer is sensitive to axis and power drift, for checking balance lenses and plano-prism jobs, for confirming that a supposedly plano lens really is plano before it is glazed, and for investigating the kind of complaint where a patient reports something subtly wrong with a new pair that a less precise instrument cannot explain. Pupil height is displayed directly on screen, allowing the fitting height of a progressive or bifocal to be checked against the specification at the moment of verification rather than measured separately or estimated afterwards, which is most valuable on varifocal remakes and on jobs where the corridor is not sitting where the wearer expects. Contact lens measurement extends down to lenses 5mm in diameter, so small-diameter rigid and specialist lenses can be read on the instrument itself instead of being estimated or sent elsewhere; this is useful for verifying supplied orders, checking a patient's existing lens, and troubleshooting a fitting that is not performing as intended. Readings are presented on a clear colour display that shows sphere, cylinder, axis and prism together, keeping verification to a single glance rather than a sequence of screens, with the axis target shown graphically alongside the numbers. In daily use the JS-700A handles the full run of lensmeter work — verifying finished spectacles against the written prescription before collection, checking sphere, cylinder and axis on incoming jobs, measuring and confirming prescribed prism, marking optical centres ahead of edging and glazing, and neutralising unknown lenses for patients who arrive without a copy of their prescription — while the low-degree resolution makes it particularly suited to practices doing precision work, second-opinion checks and remake investigation. The unit is supplied new, is CE- and ISO-certified, and ships globally through Medigear as a certified professional seller, with the full configuration and any optional accessories confirmed on request.

Low Degree Accuracy Claimed

The manufacturer claims accurate measurement of low-degree lenses below plus or minus 0.12D, reported here as their own account of the instrument.

Pupil Height on Screen

The pupil height value is displayed on the screen, which is a fitting measurement that instruments at this level do not always provide to an operator.

Wide Sphere Range

Sphere runs minus 25.00 to plus 25.00D, with cylinder and addition each from 0.00 to plus or minus 10.00D, and axis across 0 to 180 degrees in 1 degree steps.

Two Addition Values

The addition row gives two addition values rather than one, which suits bifocal designs where a single figure does not fully describe the finished lens.

Small Contact Lens Diameter

Contact lens diameter descends to 5mm, with base curve from 6.00 to 9.00 and the same sphere range as the spectacle lenses measured on the instrument.

Fine Resolution Throughout

Sphere, cylinder, addition and prism are each selectable at 0.01, 0.12 or 0.25 steps, so an operator works as finely as a particular task happens to demand.

Coloured Lens Measurement

Coloured lenses with 10 per cent transmittance are stated as measurable, which covers the tints and sunglasses a practice dispenses alongside clear lenses.

Display and Interface

The display is a 5.7 inch TFT colour LCD and the data interface is RS-232, with spectacle lens diameter accepted from 20 to 100mm across the stated range.

Weak Prescription Verification

The low-degree claim is the argument for this instrument. An eighth of a dioptre read as a quarter is a small absolute error and a large relative one, and weak lenses are exactly what a patient queries, because the difference from an old pair is subtle enough that they cannot say what feels wrong. That claim is the manufacturer's own, and worth testing upon a lens of known power first.

Progressive Lens Dispensing

Pupil height shown on screen matters here, because a progressive corridor must sit in front of the pupil and the height is what places it. Having the figure from the same instrument that reads the power means a dispensing record comes from one source, and the manufacturer describes accurate and quick progressive measurement alongside it as well.

Contact Lens Practices

Contact lens diameter down to 5mm with base curve from 6.00 to 9.00 covers trial lenses and small rigid lenses that a wider minimum would refuse. For a practice checking what a patient has arrived wearing, or identifying an unlabelled lens, having both the power and the curvature at one bench removes a separate piece of equipment from the consulting room entirely.

Tinted Lens Work

Coloured lenses at 10 per cent transmittance are stated as measurable. Tints darken the light reaching a sensor, so plainer instruments struggle with exactly the sunglasses a practice sells at the highest margin and a patient is most likely to bring back. Being able to verify them at the bench closes that gap in what can actually be checked at all.

Precision Where It Is Proportionally Largest

A claim of accuracy below 0.12D addresses precisely the lenses where error matters most in relative terms. A quarter dioptre of error upon a five dioptre lens is trivial; the same error upon a quarter dioptre lens is total. Weak prescriptions are also the very ones that patients query most often, so an instrument reading them confidently answers the awkward question instead of quietly compounding the problem for everybody.

Fitting Height Without a Ruler

Displaying the pupil height on screen brings a fitting measurement onto the same instrument as the powers. A progressive dispense depends upon that height placing the corridor in front of the pupil, and taking it from the instrument instead of a rule removes both a step and a source of variation between whichever members of staff happen to be doing the measuring on any given day of a busy week.

Honest About What Is Optional

The feature list marking the PD, ultraviolet and printer as optional is far more useful than silence would be, even though the data table below it then contradicts the point. A practice reading the card carefully will know to ask, and asking is what prevents an instrument arriving without the very function somebody had assumed was included in the quoted price.

The Visionstar JS-700A reads sphere from minus 25.00 to plus 25.00D, cylinder from 0.00 to plus or minus 10.00D presentable as minus, mixed or plus, and addition from 0.00 to plus or minus 10.00D with two addition values. Axis covers 0 to 180 degrees and prism 0.00 to 10.00 in both directions, each selectable at 0.01, 0.12 or 0.25 steps. Contact lenses carry base curve from 6.00 to 9.00 with diameter down to 5mm, spectacle lens diameter runs 20 to 100mm, and coloured lenses at 10 per cent transmittance are measurable. Pupil height is displayed on the 5.7 inch TFT colour LCD, and the data interface is RS-232.

Three points need settling before an order. The feature list marks the PD instrument, the UV instrument and the thermal printer as optional while the data table lists all three as though fitted, so what is included should be confirmed in writing. A second model number is named with no stated difference. And four rows are garbled or incomplete in print: the contact lens row, the ultraviolet row, the addition row which repeats itself, and the PD row which gives one figure where a range belongs.

If your practice verifies weak prescriptions, dispenses progressive lenses, or fits small contact lenses, speak to Medigear.uk. As a verified medical equipment supplier working across medical, dental, rehabilitation and aquatic therapy settings, the team will confirm exactly what is supplied.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

That really needs confirming in writing. The feature list describes all three as optionally installed, while the technical data below then lists them as though they were all fitted. The two halves of the card disagree, and the feature list reads as the more cautious of the two statements made, so it is the one to trust.

The manufacturer claims an accurate measurement of the low-degree lenses below plus or minus 0.12D. Weak prescriptions are where a small absolute error is proportionally large, so it is a useful claim, though it belongs to the manufacturer, and is worth testing upon a lens of known power.

Yes, it does. The pupil height value is displayed upon the screen itself. That is a fitting measurement instruments at this level do not always provide, and it matters for a progressive dispense because the height is what places the corridor in front of the pupil of the wearer's eye where it belongs.

The sphere runs minus 25.00 to plus 25.00D, cylinder 0.00 to plus or minus 10.00D and addition 0.00 to plus or minus 10.00D with two addition values. Axis covers 0 to 180 degrees and prism 0.00 to 10.00 in both horizontal and vertical directions right across the instrument.

Contact lens diameter descends to 5mm, with base curve from 6.00 to 9.00 and the same sphere range as the spectacle lenses. That covers trial lenses and small rigid lenses which an instrument with a wider minimum would otherwise simply refuse to accept upon the stage at all.

Coloured lenses with 10 per cent transmittance are stated as being measurable. Tints reduce the light reaching a sensor, so the plainer instruments struggle with them, and being able to check them at the bench covers a proportion of what a practice dispenses which might otherwise go entirely unverified.

Four of them in total. The contact lens row, the ultraviolet row and the addition row, which repeats itself, are each unclear in print. The PD row gives a single figure of 80mm where a range belongs. All four should be confirmed with Medigear.uk well before anything at all is finally specified for a practice.

Yes, a second model number does appear alongside this one, with nothing stated to separate them anywhere on the material. Whether they vary in price, in build, or in the fitting of those optional instruments is a question to put to Medigear.uk quite directly.