Visionstar JSL-104

Subjective refraction with a trial frame is the core use. Every trial frame on this site needs a matching set of lenses, and a complete, organised set is what makes frame refraction practical.

Domiciliary work suits a set that weighs 2.5 kg in its case and measures just over a third of a metre across, small enough to carry alongside a frame and chart.

High prescriptions are checked in a trial frame with trial lenses, where vertex distance can be set, which a phoropter only approximates.

Low vision assessment relies on trial lenses, often at high powers, held in a frame the patient can move and read with.

Paediatric refraction and retinoscopy use trial lenses with children's frames, where a phoropter is impractical.

Optometry students and teaching clinics need full sets for practice, and a labelled tray helps learners find and return lenses correctly.

Busy clinics benefit from labelled compartments, which make a missing lens obvious before the next patient.

Compatibility with existing frames depends on the unpublished ring outer diameter, which should be confirmed before relying on the set alongside frames you already own.

Organised for speed

Labelled rows let the clinician reach for the right power without searching.

Metal-ringed lenses

Rings protect lens edges from chipping and give frame cells a firm edge to grip.

A stated aperture

The 36.5 mm inner diameter gives a known clear viewing area.

Velvet-lined tray

A soft lining protects lenses from scratching between uses.

Portable

At 2.5 kg packed, the set travels easily for domiciliary and outreach work.

Compact footprint

355 × 233 × 34 mm is small for a full set.

Missing lenses are obvious

An empty labelled slot shows at once when a lens has not been returned.

Supports every trial frame

The essential companion to any frame-based refraction, once compatibility is confirmed.

Its unknowns stated plainly

Contents, power range, ring outer diameter and the case are all identified here to confirm.

Metal rings

Each lens is edged in metal, per the manufacturer.

36.5 mm inner diameter

The clear aperture of each ring.

Overall size

355 × 233 × 34 mm.

2.5 kg packed weight

Including the case.

Labelled velvet tray

Lenses sit in labelled rows on a red velvet lining.

Central accessory

A handled item shown in the tray. Identity confirmed at order.

Case

Stated as aluminium; the photograph shows a black-covered case. Confirmed at order.

Ring outer diameter

Not published. Confirmed against your trial frames before supply.

Lens count

Not stated. Confirmed before supply.

Power range and steps

Not published. Confirmed before supply.

Prisms and auxiliary lenses

Not stated. Confirmed at order.

Lens material

Not stated. Confirmed at order, along with suitable cleaning agents.

The Visionstar JSL-104 is a trial lens set with metal-ringed lenses of 36.5 mm inner diameter, laid out in a labelled velvet tray and packed at 2.5 kg with its case, in a compact 355 × 233 × 34 mm. It is the companion every trial frame needs, organised so the right lens is found quickly and a missing one is obvious. The metal rings protect the lens edges and give the frame a firm grip. The published data leaves the most important questions open: how many lenses it contains, which powers it covers, the ring outer diameter that decides whether it fits your frames, and whether the case is aluminium as stated or the black case shown. Medigear.uk confirms each in writing. Contact the Medigear.uk team for pricing and full contents.