Visionstar CV-600

The wide measurement range points this instrument at practices whose caseload runs past the ordinary. Aphakic refraction — patients without a crystalline lens and without an intraocular implant — routinely requires corrections well above +10.00D, and high myopia beyond -20.00D occurs in every substantial patient base. Practices currently reaching for a trial frame in these cases can keep the refraction in the lane, which is faster, more repeatable and considerably more comfortable for a patient who is already having a longer appointment than most.

High astigmatism is the parallel case. Corneal astigmatism above 6.00D occurs in keratoconus under correction, following corneal grafts and after some cataract surgery, and a ±8.00D astigmatic range keeps those refractions on the instrument. Hospital eye service departments, corneal clinics and specialist contact lens practices see this population disproportionately.

Vertex distance control connects directly to that population. Effective lens power varies with distance from the cornea, and the discrepancy becomes clinically obvious in high prescriptions — a refraction taken at one vertex distance and dispensed at another simply will not deliver what was measured. Five settings from 12 mm to 20 mm let the refraction be matched to the intended frame fit, which is precisely what a high-power practice needs and what makes the ±27.00D range usable rather than nominal.

General community optometry gets the everyday benefits alongside: the auto Jackson cross cylinder standardises the refinement step across clinicians and locums, the 10.4-inch touchscreen consolidates the sequence, and face-to-face testing preserves the conversation that subjective refraction depends on. Practices should note the standing access limitation — a phoropter head needs an upright seated patient, and the 53 mm minimum pupillary distance at 40 cm convergence is a further constraint on narrow-PD and paediatric patients — so trial frame capability should be retained alongside.

Range that keeps high prescriptions in the lane

At ±27.00D sphere and ±8.00D astigmatic power, refractions that would otherwise move to a trial frame stay on the instrument. For practices seeing aphakia, high myopia and post-surgical cases that is faster, more repeatable and less tiring for a patient already facing a long appointment.

Vertex control that makes the range usable

Five corneal vertex settings from 12 mm to 20 mm let the refraction be matched to the intended frame fit. Without that, a wide power range is a nominal specification; with it, high-power prescriptions actually translate into spectacles that deliver what was measured.

Automated cylinder refinement

The auto Jackson cross cylinder standardises the step most sensitive to clinician pace and habit. Presentation timing and sequence are identical for every patient, which reduces the between-clinician variation that shows up in shared and locum-covered lanes.

Fine prism resolution

Prism to 20Δ in all directions with a 0.1Δ minimum step is finer than most trial prism sets offer, which matters for careful phoria work and for prescribing the small stabilising prisms where a half-dioptre difference is perceptible to the patient.

A large, legible console

A 10.4-inch LCD is among the larger touchscreens on a refractor console, presenting the full instrument state and test sequence at once rather than paging between views — useful in a dim room and useful for a supervisor observing a trainee.

Face-to-face examination

The compact head lets the clinician sit facing the patient. Hesitation, squinting and uncertainty are visible in the face and are genuine clinical information, and a clinician looking at a console instead of a patient loses all of it.

Alignment without breaking dark adaptation

Pupillary distance and anterior eye alignment can be set under the dim conditions refraction is performed in, so the room lights need not be raised mid-examination to check positioning.

Comprehensive auxiliary lens complement

Red-green and polarised filters, dissociating prisms, Maddox rods, retinoscopy lenses, presbyopic cross cylinders, occluders and pinhole are all built in, so binocular vision assessment runs without reaching for a separate trial set.

Modular three-part construction

Head, controller and supply unit are discrete components at 4.5 kg, 1.8 kg and 2 kg, allowing each to be sited where it works — the controller at the clinician's position, the supply unit out of the way.

Spherical power ±27.00D

Sphere covers +27.00D through -27.00D, a range extending well beyond ordinary refractor heads to accommodate aphakic, high myopic and complex post-surgical prescriptions.

Four selectable sphere steps

Increments of 0.25D, 0.50D, 1.00D and 3.00D allow rapid coarse bracketing and fine endpoint refinement without leaving the sequence.

Astigmatic power ±8.00D

Astigmatic power spans +8.00D to -8.00D in 0.25D or 1.00D steps, exceeding the ±6.00D typical of refractor heads and covering high corneal astigmatism and post-graft refractions.

Cylinder axis 0–180° at 1° or 5°

Axis reads across the full semicircle in single-degree or five-degree increments, matching prescription notation while allowing quicker movement during bracketing.

Prism 0–20Δ in all directions

Prism covers 0 to 20 prism dioptres in all directions with 0.1Δ, 0.2Δ, 0.5Δ and 1.0Δ steps, supporting fine phoria measurement and precise prism prescribing.

Auto Jackson cross cylinder ±0.25D

Cylinder power and axis refinement is automated at ±0.25D, standardising the presentation and removing manual lens reversal from the sequence.

Five vertex distance settings

The corneal alignment scale on the optical axis offers 12 mm, 13.75 mm, 16 mm, 18 mm and 20 mm, letting the refraction be matched to the intended spectacle fit.

Pupillary distance 48–80 mm

PD adjusts across 48 mm to 80 mm in 0.5 mm or 2.0 mm steps, covering the range of adult and older paediatric interpupillary measurements.

Near-point convergence at 40 cm and 67 cm

Convergence supports two near working distances, with a minimum pupillary distance of 53 mm at 40 cm convergence.

15 mm forehead rest adjustment

The forehead rest adjusts through 15 mm to accommodate varying facial geometry and seat the patient consistently against the instrument.

10.4-inch LCD touchscreen

A large colour touchscreen console presents lens state, auxiliary lens selection and test sequence on a single legible surface suited to a dimly lit room.

Full auxiliary lens complement

Red-green filter, polarised filters at 45° and 135°, 6Δ and 10Δ dissociating prisms, horizontal and vertical red Maddox rods, +1.5D and +2.0D retinoscopy lenses, 0.50D presbyopic cross cylinders, occluding plates, and pinhole and cross-hairs glass for each eye.

Dark-room PD and anterior eye alignment

Alignment of pupillary distance and the anterior eye is performed under the dim conditions of the refraction itself, without raising room lighting.

Compact head for face-to-face testing

The head profile is compact enough for the clinician to sit facing the patient, preserving direct observation of facial cues throughout the subjective sequence.

Three-part modular build

Main unit at 300–330 × 120 × 300 mm and 4.5 kg, touchscreen controller at 300 × 225 × 203 mm and 1.8 kg, and supply unit at 230 × 100 × 110 mm and 2 kg.

The Visionstar CV-600 is a wide-range automated phoropter for UK practices whose refraction caseload runs beyond the ordinary. Spherical power of ±27.00D and astigmatic power of ±8.00D keep aphakic, high myopic, high astigmatic and post-surgical refractions in the lane instead of moving them to a trial frame, and five corneal vertex settings from 12 to 20 mm ensure those high-power results translate correctly into dispensed spectacles. Prism to 20Δ at 0.1Δ resolution, an auto Jackson cross cylinder, a full auxiliary lens complement, near-point convergence at 40 and 67 cm, dark-room alignment and a 10.4-inch touchscreen round out a specification suited to hospital eye service departments, corneal and specialist contact lens clinics, and community practices wanting headroom they will not outgrow. Practices with significant paediatric or accessibility caseloads should retain trial frame refraction alongside. Medigear.uk supplies the CV-600 into the UK with pre-despatch functional inspection, documentation review and ongoing support. Contact the Medigear.uk team for current pricing, quantity quotations, refraction unit and arm compatibility, or bespoke configuration enquiries.