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ENT, Ophthalmic & Sensory
Visionstar LY-23N

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Visionstar ENT, Ophthalmic & Sensory

Visionstar LY-23N

Product Code: EOAS-OD-2885

The lamp behind the patient's chair is not a calibrated instrument.

Near acuity, lit from inside. The LY-23N backlights its near chart at 30 cm in an aluminium alloy frame, so the result depends on the instrument rather than on whatever lamp happens to be standing behind the patient.

Sections

Near Vision Testers

Categories

ENT, Ophthalmic & Sensory

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

The Visionstar LY-23N is an LED-backlit near visual chart in an aluminium alloy frame, and its argument is straightforward: near acuity should not depend on the room.

A printed near card is read under whatever light reaches it, and in practice that means a lamp positioned by someone, at some angle, at some distance, possibly years ago. Near acuity is sensitive to illumination — the same patient reads a line or two differently under a bright directed lamp than under ambient room light — and the variability of that arrangement is rarely acknowledged. It varies between rooms, between practices, across the day and with the season, and none of it appears in the record. Backlighting the chart removes the whole variable: the target is lit from inside at a consistent level, so a result taken in December is comparable with one taken in June, and one taken in a treatment room is comparable with one taken in a consulting room.

The test distance is 30 cm. This matters more on a near chart than it may appear, because near acuity notation is distance-dependent — a chart calibrated for 30 cm gives a correct result only when read at 30 cm, and "about arm's length" varies considerably between patients and clinicians. Confirm the working distance is measured rather than estimated, and record it.

The manufacturer illustrates two orientations, portrait and landscape, with tumbling E optotype rows and acuity values marked in columns alongside. At 0.5 kg gross and packing at 305 × 195 × 55 mm, the unit is genuinely light — comfortably held by a patient for the duration of a near assessment, which matters with elderly patients and anyone with a tremor or upper limb weakness.

The manufacturer states the chart is adjusted according to national standards without naming them, and specifies an LED light source and aluminium alloy frame. Unit dimensions, power supply, luminance and the chart acuity range are not published. Medigear.uk supplies the LY-23N with pre-despatch functional inspection, documentation review and full specification confirmation at quotation.

Routine near acuity measurement is the everyday use, and controlled illumination is what raises it above a printed card. Near acuity is sensitive to how the target is lit, and a card read under a lamp someone positioned at some point in the past introduces a variable that never reaches the record. Backlighting fixes the illumination at a consistent level, which makes a near result taken today comparable with one taken at the previous visit and with one taken in a different room. For practices monitoring near function over time — cataract progression, macular disease, presbyopic change — that comparability is the point.

Domiciliary and care setting work benefits disproportionately. A care home lounge, a bedside or a day room offers whatever light it offers, frequently poor and rarely adjustable, and a printed near card in those conditions measures the room as much as the patient. A self-illuminated chart at half a kilo removes that dependence entirely and is light enough to carry through a full visiting list.

Patients who struggle to hold a target steady are served by the weight. Elderly patients, those with tremor and anyone with upper limb weakness will shake a heavier unit, and the reading degrades for reasons unrelated to vision. Half a kilo is comfortably held for the duration of a near assessment.

Two points belong in the decision. The 30 cm distance must be measured rather than estimated, since near acuity notation is distance-dependent and arm's length varies considerably. And the unpublished list is substantial for a chart of this simplicity — acuity range, notation system, power supply, luminance and unit dimensions are all absent, and the acuity range in particular should be obtained in writing before ordering.

The illumination stops being a variable

A printed near card is read under whatever light reaches it, which changes between rooms, across the day and whenever someone moves a lamp. Backlighting fixes the level, so results are comparable between visits and between rooms.

Comparable results over time

Practices monitoring near function through cataract progression, macular disease or presbyopic change need this visit's result to mean the same thing as last visit's. Consistent illumination is what makes that true.

Works where the lighting does not

Care home lounges, bedsides and day rooms offer whatever light they offer. A self-illuminated chart removes the dependence entirely, which is the difference between a usable domiciliary near result and a doubtful one.

Light enough to hold steady

At half a kilo the unit is comfortably held for a full near assessment. With elderly patients, tremor or upper limb weakness a heavier chart shakes, and the reading degrades for reasons that have nothing to do with vision.

Portrait or landscape

Two orientations are illustrated, so the chart can be specified to suit how clinicians actually hold and present it rather than accepting a single fixed format.

A frame built for handling

An aluminium alloy frame suits an instrument that is picked up, put down, handed to patients and occasionally dropped — considerably more handling than a wall chart ever receives.

Nothing to configure

No settings, no software and no distance to enter on a display. The chart is switched on and used, identically, by whoever is holding it.

Straightforward to carry between sites

Half a kilo in a 305 × 195 × 55 mm carton travels easily, which suits domiciliary rounds, community clinics and practices moving equipment between rooms.

LED backlit near chart

An LED light source illuminates the chart face internally, holding a consistent level independent of ambient room lighting.

30 cm test distance

The chart is calibrated for a 30 cm working distance, which should be measured and set rather than estimated.

Aluminium alloy frame

The chart is housed in an aluminium alloy frame, giving rigidity and handling durability appropriate to a frequently handled instrument.

Portrait and landscape orientations

The manufacturer illustrates the chart in both portrait and landscape formats; the required orientation is specified at order.

Tumbling E optotypes

The illustrated faces use tumbling E optotypes, requiring only that the patient indicate a direction rather than name a character.

Acuity values marked alongside

Acuity values are printed in columns beside the optotype rows, as shown in the manufacturer's illustrations.

0.5 kg gross weight

At half a kilo gross the unit is comfortably held by a patient throughout a near assessment.

305 × 195 × 55 mm packed

The packed carton measures 305 × 195 × 55 mm, compact enough for domiciliary rounds and transport between sites.

Adjusted to national standards

The manufacturer states the chart is adjusted according to national standards; which standards apply should be confirmed as appropriate for UK near acuity notation.

No settings or consumables beyond the light source

There is no software, no configuration and no user-adjustable setting; maintenance is cleaning and whatever the LED and power arrangement require.

The Visionstar LY-23N is an LED-backlit near visual chart, and the case for it is that near acuity should be a measurement of the patient rather than of the room. A printed near card is read under whatever light reaches it — a lamp someone positioned at some point, at some angle, shaded as often as not by the patient's own body — and that variability never appears in the record. Backlighting the chart at a consistent level makes a result taken today comparable with one taken last year and one taken in a different room, which is exactly what monitoring near function through cataract, macular disease or presbyopic change requires. At 0.5 kg in an aluminium alloy frame, in portrait or landscape, it is light enough for elderly and tremulous patients to hold steady and compact enough for domiciliary rounds where the lighting is worst. Two things need settling: the 30 cm distance must be measured rather than estimated, since near notation is distance-dependent; and the acuity range, notation system, power supply, luminance and unit dimensions are all unpublished and should be obtained in writing. Medigear.uk supplies the LY-23N into the UK with pre-despatch functional inspection, documentation review and full specification confirmation. Contact the Medigear.uk team for current pricing, quantity quotations, orientation selection, or bespoke configuration enquiries.

FAQ

Frequently Asked Questions

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

Because near acuity is sensitive to illumination and a printed card is read under whatever light happens to reach it. That light varies between rooms, across the day, with the season and with wherever someone last moved the lamp — and none of that variation appears in the record. An internally lit chart holds a consistent level, so results are comparable between visits and between rooms.

Not reliably. Room lighting is designed for the room, not for a specific target held at a specific distance and angle, and a patient's own body frequently shades the card they are holding. Backlighting removes both problems at once, which is why it is worth paying for on an instrument that would otherwise be a printed sheet.

Because near acuity notation is distance-dependent. A chart calibrated for 30 cm gives a correct result only when read at 30 cm, and estimated working distances vary considerably — arm's length is not a standard unit. Measure it, set it, and record it, particularly if the result will be compared against a future one.

A near vision unit adds polarised binocular testing — fixation disparity, foveal suppression, cross-cylinder balance — and typically a remote and a wider test complement. This is a near acuity chart: it measures near acuity well, under controlled illumination, and does not attempt the binocular workup. For most routine near assessment that is exactly what is wanted.

The manufacturer illustrates portrait and landscape. Portrait suits a conventional column of acuity rows; landscape suits a wider layout and may sit more comfortably in some hands. Neither is clinically superior — specify the one that suits how your clinicians work, and confirm both are available.

Not published, which is the most significant omission for a near chart since near notation systems differ and the range determines what can be recorded. Obtain the range and the notation system in writing before ordering, and confirm the notation suits UK practice.

At 0.5 kg gross it is comfortably held for the duration of a near assessment. That is worth more than it sounds with elderly patients, patients with tremor and anyone with upper limb weakness, where a heavier unit shakes and the reading degrades for reasons that have nothing to do with vision.

Not published in the supplied literature — the manufacturer specifies an LED light source but gives no voltage, consumption or battery detail. Confirm whether the unit is mains powered or battery operated, and if mains, the voltage range and plug configuration, at order.

The manufacturer states it without naming the standards. Near acuity notation differs between markets, and a UK practice needs a chart appropriate to British practice. Ask which standard the printed face follows, alongside the acuity range.

An aluminium alloy frame gives rigidity and handling durability. A near chart is picked up, put down, handed to patients and occasionally dropped, considerably more often than a wall chart is touched, so frame construction bears directly on working life.

A near visual chart is a non-invasive ophthalmic device, most consistently classified as Class I under the UK Medical Devices Regulations 2002, or higher where configuration dictates. Manufacturer CE marking is noted where it appears in the product literature; Medigear.uk confirms CE marking, the declaration of conformity and current UKCA status against the shipping batch at quotation rather than asserting it in advance.

Keep the face clean with an appropriate agent — a handheld chart accumulates fingerprints in a way a wall chart does not, and fingerprints on a backlit surface scatter light. Confirm approved cleaning agents at order. Beyond that, whatever the LED module and power arrangement require. Typical warranty is 12 to 24 months against manufacturing defect, confirmed at quotation.