LINK LCP-150

Contrast sensitivity and stereo, on one screen

The LINK LCP-150 is a digital vision chart on a 23 inch panel at 1920 by 1080 with a 1000 to 1 contrast ratio. Alongside standard optotypes it carries stereo, Worth four dot, Maddox and contrast sensitivity charts, with wireless control and adjustable working distance.

Sections

Chart Projectors

Contrast Sensitivity Assessment

Sine wave grating charts allow contrast sensitivity to be measured rather than inferred. This matters because a patient can read a normal acuity line while still experiencing real functional difficulty, particularly with early cataract, certain retinal conditions and in low light driving. Acuity alone will not reveal that, and having the capability on the same screen as the standard charts makes investigating it a natural extension of the examination rather than a separate undertaking requiring different equipment.

Binocular Vision and Stereo Testing

Worth four dot, stereo, Maddox rod, cross grid and binocular balance charts sit alongside the acuity optotypes. Suppression, fusion and stereopsis can all be assessed without changing equipment or repositioning the patient, which keeps the binocular state undisturbed. The red green dissociation charts extend that further, and everything runs from the same wireless handset the acuity testing uses.

Paediatric and Low Vision Testing

Paediatric optotypes, a low vision test mode for acuities of 4.0 and below, and ETDRS charts together cover patients at both ends of the ability range. Children who cannot read letters, and patients with substantially reduced vision who fall off the bottom of a conventional chart, are both accommodated on the same display without printed charts being fetched and held up by hand.

Rooms of Differing Size and Lighting

Working distance adjustable in 0.1 metre steps, combined with brightness from 80 to 320 candela per square metre, lets the display be calibrated to the room rather than the room being arranged around the display. Optotype sizing follows the configured distance, so a shorter consulting room still produces correctly scaled charts instead of approximately sized ones.

Testing That Acuity Alone Would Miss

Contrast sensitivity is the capability here that changes what a practice can detect. Patients reporting difficulty despite normal acuity are a recurring frustration, and without a contrast function the practitioner has little to offer beyond reassurance. Having sine wave gratings on the same screen turns that conversation into a measurement, which is better for the patient and considerably better for the practice. Measurement beats reassurance every time. Detecting what others miss is a genuine clinical advantage.

One Screen for the Whole Examination

Acuity, binocular, stereo, colour, astigmatic and contrast charts all live on one panel. The patient stays seated and positioned while the examination moves between them, and nothing has to be fetched or held up. Continuity matters most in binocular testing, where the state being measured is easily disturbed by the act of changing equipment partway through. Fewer interruptions make for more dependable binocular findings.

Calibrated to the Room It Occupies

Adjustment of working distance in tenth metre steps, alongside a wide brightness range, means optotype sizing and chart luminance both reflect the actual conditions. Both variables affect measured acuity directly, so a display that can be set to the room produces results that compare properly against previous visits and against other practices. Comparable conditions are what make results genuinely comparable. Both variables affect the recorded figure directly.

Twenty Three Inch Medical Grade Panel

A 23 inch display at 1920 by 1080 with a stated 1000 to 1 contrast ratio. Edge definition on small optotypes is what the patient resolves, so panel quality bears directly on the result.

Contrast Sensitivity Function

Sine wave grating charts support contrast sensitivity assessment, which detects visual loss that a standard acuity chart can miss entirely in patients reading a normal letter line.

Stereo and Binocular Testing Charts

Worth four dot, stereo, Maddox rod, cross grid, binocular balance and alignment charts are all carried, so binocular assessment runs on the same screen as the acuity work.

Four Optotype Notations

Sizes appear in decimal, five point, foot based Snellen and metre based Snellen notations, so results are read in whichever convention the practice records against.

Wide Brightness Range

Brightness spans 80 to 320 candela per square metre. Chart luminance affects measured acuity, so matching the display to room lighting is a clinical setting rather than a comfort one.

Adjustable Working Distance

Working distance adjusts in 0.1 metre increments under remote control, allowing optotype sizing to be calibrated to the room the display actually sits in.

Three Test Modes

Naked eye, with glasses and low vision modes at 4.0 or below are provided, switching automatically or manually according to how the examination is being conducted.

Wireless Control and Flexible Mounting

A Bluetooth module gives control at a stated range beyond 30 metres, and the panel mounts on a desktop, a wall, or an independent stand offered as an option.

The LINK LCP-150 digital vision chart covers considerably more than acuity. Its 23 inch panel runs at 1920 by 1080 with a stated 1000 to 1 contrast ratio, and the chart library takes in E, C, letters, numbers, paediatric and ETDRS optotypes alongside astigmatism charts, red green, cross grid, Worth four dot, stereo, Maddox rod, alignment charts, clock dial, binocular balance, colour blindness and a contrast sensitivity function using sine wave gratings.

Optotype sizes are presented in four notations, display modes cover single optotype through to full screen with a pointer function, and backgrounds switch between red and green, monochrome, contrast and low brightness. Brightness spans 80 to 320 candela per square metre, working distance adjusts in 0.1 metre steps under wireless control, and three test modes cover naked eye, with glasses and low vision. The panel measures 560mm by 345mm by 50mm at approximately 4.95kg, mounting on a desktop, a wall or an optional stand. Mains configuration, the working distance discrepancy noted above, certification status, condition and reseller and listing rights for the manufacturer trademark all warrant confirming. A display of this kind stays in service for many years, so settling the specification at the outset is time well spent. Speak to Medigear.uk, a verified medical equipment supplier, and we will establish the full specification.

FAQ

Frequently Asked Questions

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

It uses sine wave grating charts to measure how well a patient distinguishes shades separated by only slight contrast. Someone can read a normal acuity line and still have genuine difficulty in low light or with early cataract, and a standard chart will not reveal it. Measuring contrast sensitivity turns a vague complaint into a recorded finding.

Basic optotypes cover E, C, letters, numbers, paediatric and ETDRS. The functional set adds astigmatism charts, dots, red green, cross grid, Worth four dot, stereo, Maddox rod, alignment charts, cross ring, cross fixation point, clock dial, binocular balance, colour blindness and the contrast sensitivity function. That breadth covers most of what a thorough examination calls for.

Four are provided: decimal from 0.1 to 2.0, a five point scale from 4.0 to 5.3, foot based Snellen from 20 over 10 to 20 over 200, and metre based Snellen from 6 over 3 to 6 over 60. Results can therefore be read in whichever convention your records use.

Brightness spans 80 to 320 candela per square metre and adjusts finely, from very low for darkened rooms through to high for brightly lit spaces. Chart luminance affects measured acuity directly, so setting the display to suit the room is a clinical consideration and not merely a question of preference.

The specification table states 1 to 10 metres adjustable in 0.1 metre steps under remote control, while the feature summary on the same sheet describes 1.0 to 6.0 metres. Those two figures do not agree, so we would ask Medigear.uk to confirm the actual range before you commit to the display.

A Bluetooth module provides wireless control at a stated working range beyond 30 metres, so the practitioner stays with the patient throughout. QR code scanning is also described among the features, though exactly what it is used for is worth clarifying beforehand.

Three: naked eye, with glasses, and a low vision mode for acuities of 4.0 and below. Switching between them happens automatically or manually. The low vision mode matters for patients who fall off the bottom of a conventional chart and would otherwise be recorded only as unable to read the smallest line. Recording a usable low vision result serves the patient far more than recording a failure to read.

Desktop, wall mounted or an independent stand offered as an option. The panel measures 560mm by 345mm by 50mm at approximately 4.95kg, which suits a standard wall bracket. Which mounting hardware accompanies a given unit should be confirmed with Medigear.uk. A weight in this region sits comfortably within standard bracket ratings.