Visionstar JS-8800

Every Lens Type Named

Single vision, bifocal, trifocal, progressive power and contact lenses are all named as measurable, alongside coloured lenses above 10 per cent transmittance.

Fitting Measurements Included

Pupil distance, pupil height and lens diameter are each measured, so the fitting figures come from the same instrument that reads the lens powers themselves.

Abbe Number Compensation

Compensation is offered across an Abbe number range of 20 to 60, which allows high index materials to be read correctly rather than merely approximated.

Contact Lens Base Curve

Contact lenses are measured with base curve from 6.00 to 9.00, so a rigid fitting can be checked on the same bench that verifies the spectacle lenses.

Cylinder, Addition and Axis

Cylinder runs 0 to plus or minus 10D and addition 0 to 10D, each selectable at 0.01, 0.12 or 0.25D, with axis across 0 to 180 degrees in 1 degree steps.

Wide Lens Acceptance

Lens diameter reaches approximately 120mm at maximum, which takes uncut blanks as readily as the finished lenses a practice more usually presents to it.

Backlit Graphic Display

The display is a full graphic black and white LCD at 320 by 240 with a backlight, keeping it readable in a dimly lit consulting room during a measurement.

Built In Printer

A built-in thermosensitive printer takes paper of 38mm width, so a measurement is recorded on paper at the instrument rather than being copied out by hand afterwards.

Practices Dispensing Everything

The named lens coverage is the argument for this instrument. Single vision, bifocal, trifocal, progressive, contact and tinted lenses are all measurable, alongside the fitting figures. A practice covering that range would otherwise assemble the measurements from more than one machine, and consolidating them saves both outlay and the bench space that a second instrument would otherwise occupy in a room.

High Index Lens Work

Abbe compensation from 20 to 60 matters where lenses are thinned for strong prescriptions. High index materials disperse light differently from the ordinary crown glass, and reading them as though they do not introduces an error that grows with the power. Setting the constant to the actual material is what makes a verification worth something at all upon those particular lenses.

Multifocal Verification

Bifocals, trifocals and progressive power lenses are each named. A trifocal has an intermediate as well as a near addition, and a progressive has no single power at all, so a practice checking what a laboratory supplied needs an instrument that reads the design as it actually is, and does not reduce it to one figure that hides most of what actually matters to the wearer of it.

Sunglass and Contact Lens Fitting

Coloured lenses above 10 per cent transmittance and contact lenses with base curve from 6.00 to 9.00 are both covered here. That suits any practice dispensing tints and fitting contact lenses beside ordinary spectacles, since all three can be verified at one bench without separate equipment being kept for each of the different jobs it happens to be doing that week.

One Instrument, the Whole Range

Naming every lens type a general practice dispenses, and adding pupil distance and pupil height, means one machine covers work that often takes two. For a practice with a single consulting room, or one bench shared between rooms, that consolidation is worth more than any individual figure in the measuring ranges, because it decides whether the work can be done in the very room where the patient is sitting.

The Material Is Accounted For

Abbe compensation across 20 to 60 addresses something most lensmeters simply assume. A high index lens does not behave like crown glass, and reading it as though it does introduces an error that grows with the power of the lens. For a practice thinning strong prescriptions, setting the constant to the material is the difference between a real verification and an approximation quietly dressed as one.

Readable in Any Lighting

A backlit display for dim rooms, with stated immunity to environmental light for bright ones, covers the lighting a practice actually has rather than the lighting a specification assumes. Very few benches sit in ideal conditions, and an instrument that works beside a window and in a dim back room alike removes a practical constraint on where the instrument can usefully be placed at all.

The Visionstar JS-8800 measures single vision, bifocal, trifocal, progressive power and contact lenses, together with coloured lenses above 10 per cent transmittance, pupil distance, pupil height and lens diameter. Cylinder runs 0 to plus or minus 10D and addition 0 to 10D, each selectable at 0.01, 0.12 or 0.25D, with axis across 0 to 180 degrees. Contact lenses carry base curve from 6.00 to 9.00, Abbe number compensation spans 20 to 60, and lens diameter reaches approximately 120mm. The display is a backlit 320 by 240 graphic LCD and the built-in thermosensitive printer takes 38mm paper.

Three points need settling before an order. The card names a second model with one shared data set and nothing stated to separate them. The sphere row is printed as 0 to plus 25D, which read literally would exclude every minus lens, while the contact lens row on the same card gives plus or minus 25D. The prism row gives steps without a clear upper limit and mixes its units, and the PD row gives a single figure where a range belongs. The accuracy and environmental light claims are the manufacturer's own, reported rather than endorsed.

If your practice dispenses across the whole range of lens types, works with high index materials, or wants the fitting figures from the same instrument as the powers, speak to Medigear.uk. As a verified medical equipment supplier working across medical, dental, rehabilitation and aquatic therapy settings, the team will confirm the corrected specification.