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Visionstar TF-A
Visionstar TF-A
Visionstar TF-A
Visionstar TF-A
Visionstar ENT, Ophthalmic & Sensory

Visionstar TF-A

Product Code: EOAS-OAVT-3407

Lenses held by sprung clips, so they stay put when the head turns.

A lens that shifts mid-test changes the answer. The TF-A holds each one behind a spring clip, in grey or colour, across ten fixed sizes from 52 to 70 mm.

Sections
Trial Lens Sets & Frames
Categories
ENT, Ophthalmic & Sensory
Condition
New
Origin
China
Seller Type
Certified Professional Seller
CE & ISO Certified
Global Shipping
Supplier: Medigear
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The Visionstar TF-A is a fixed-PD trial frame from a family of five models, the TF-AT, TF-A, TF-C, TF-CT and TF-T, that share a single specification sheet. The sheet gives one figure for the whole family: PD options of 52, 54, 56, 58, 60, 62, 64, 66, 68 and 70 mm. It shows the TF-A in two finishes, grey and colour, with the colour example photographed in blue.

The rest of this page describes what the photographs show, and it is flagged as such.

The TF-A has separate cells, each ringed with printed scales and fitted with visible sprung clips that press the trial lenses into place. The front has a rounded spectacle-like outline, and the temples run back and hook down behind the ear.

The clips are the practical point. A trial lens held only by the fit of the cell can loosen or shift, particularly when a patient turns their head, looks down to read or moves between distance and near targets. A lens that moves during a measurement changes the result without anyone noticing. Sprung clips hold each lens firmly, which matters most with several lenses stacked in one cell.

The naming suggests the TF-A is the base model of the family, with the TF-AT a variant of it. In the photographs the two look almost identical, and the sheet does not say what the "T" adds. That is the first thing to establish if you are choosing between them.

Unpublished are the lenses per cell, weight, cell diameter, frame material, what separates the TF-A from the TF-AT, whether the scales are axis calibration, and whether anything adjusts.

Near and reading assessment is where lens security matters most. A patient who looks down to read, then up to a distance chart, moves the frame with every change, and a lens that shifts in the cell alters the result.

Complex prescriptions with several lenses stacked in one cell benefit most from clips, since a stack held only by friction is more likely to move than a single lens.

High-volume adult refraction suits a standard fixed-PD frame that is quick to select and holds its lenses reliably across a busy list.

Domiciliary work involves patients who move more freely than in a consulting room chair, which makes secure lens retention more valuable away from the clinic.

Practices choosing a single model from this family may find the TF-A a sensible default, subject to confirming how it differs from the TF-AT.

Training clinics can use a clip-retained frame to teach correct lens handling without lenses falling out during practice.

Children below 52 mm fall outside the range and need a paediatric frame.

Complex prescriptions still depend on the lens capacity, which we confirm before recommending the frame for that work.

Lenses held firmly

Sprung clips press each lens into its cell, so it does not shift during a measurement.

Stable through head movement

Patients turning or looking down to read do not dislodge the lenses.

Better with stacked lenses

Clips keep several lenses in one cell secure where friction alone might not.

The family's standard model

The base of a five-model range, and a sensible default where no specific variant is needed.

Ten fixed sizes

52 to 70 mm in 2 mm steps covers most adults and many older children.

Printed cell scales

Markings around each rim, subject to confirmation as axis calibration.

Grey or colour

A neutral finish for clinical settings, or a colour option where a friendlier look helps.

Spectacle-like shape

A rounded front and hooked temples resemble ordinary glasses.

Its unknowns stated plainly

Lens capacity, weight and the difference from the TF-AT are all flagged to confirm before ordering.

Sprung lens clips

Clips on each cell press the trial lenses into place, as shown in the photographs.

Separate cells

Each lens cell is a distinct ring rather than part of a moulded front.

Ten PD options

52, 54, 56, 58, 60, 62, 64, 66, 68 and 70 mm.

Grey finish

Neutral grey, as published.

Colour finish

A colour option, shown in blue. Available shades confirmed at order.

Printed cell markings

Visible around each rim. Axis calibration confirmed at order.

Hooked temples

Temples curve down behind the ear, spectacle-style.

No interpupillary adjustment

Fixed per frame by design.

Lenses per cell

Not stated. Confirmed before supply.

Weight

Not published. Obtained before supply.

Cell diameter

Not published. Confirmed against your trial lens set at order.

Difference from the TF-AT

Not stated. Confirmed in writing before supply.

The Visionstar TF-A is the standard fixed-PD frame in a family of five, with sprung clips holding each lens in its cell, printed scales around the rims, and a choice of grey or colour across ten sizes from 52 to 70 mm. The clips are the reason to choose it: a lens that shifts when a patient turns or looks down changes the measurement silently, and clips stop that happening, especially with several lenses stacked. It is near-identical to the TF-AT in the photographs, and the sheet does not say what separates them. Lens capacity, weight, cell diameter and that difference all need confirming, and Medigear.uk establishes each in writing. Contact the Medigear.uk team for pricing and a clear comparison.

FAQ

Frequently Asked Questions

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

Because a lens that moves changes the measurement. Trial lenses held only by the fit of the cell can shift when a patient turns their head or looks down to read, and a small change in position alters the result without anyone seeing it happen. Sprung clips hold each lens firmly throughout.

The sheet does not say, and in the photographs the two are almost identical. The naming suggests the TF-A is the base model and the TF-AT a variant, but we do not guess at what the "T" adds. Medigear.uk establishes the difference in writing before you choose.

Not stated on the sheet. Other Visionstar fixed-PD frames take three or four per side, and that decides whether a full prescription can be built at once. We confirm the figure before you order.

Slightly, since a lens has to be pressed past the clip rather than simply dropped in. Most clinicians find it quickly becomes automatic, and the security it gives is worth the extra second.

The sheet shows grey and a colour option, photographed in blue. Whether other colours are offered, and whether colour identifies size, is not stated. We confirm at order.

The photographs show printed markings around each rim, which usually indicates axis calibration, but the data does not say so. We confirm before you order.

Ten, from 52 to 70 mm in 2 mm steps. Patients between sizes are fitted to the nearer frame, which is acceptable at lower powers and less so at higher ones.

Not stated. The frame is fixed for interpupillary distance by design, and whether the nose pads or temples adjust is confirmed at order.

Not published. We obtain the figure rather than estimate it.

Not published. Trial lenses are commonly 38 mm, and the frame must match the set you own. We confirm the cell diameter before you order.

A trial frame is generally a Class I medical device under the UK Medical Devices Regulations 2002. Medigear.uk confirms CE marking, the declaration of conformity and UKCA status at quotation.

Check that the clips still grip firmly, since a weakened spring is the first thing to fail, keep the cells free of lens debris, and store frames by size. Typical warranty is 12 months, confirmed at quotation.