LINK ARK-1800

Hospital ophthalmology departments and NHS eye clinics benefit from the ARK-1800's hexagon prism and high-sensitivity CCD optical system, which provides unmatched accuracy and reliability in refraction and keratometry measurements across the full clinical range of sphere from -20D to +20D and cylinder from -8D to +8D. The universal 100V to 240V power supply makes the ARK-1800 suitable for deployment across any electrical supply standard without transformer conversion — a procurement advantage for NHS trusts with diverse site electrical specifications and for distributors supplying instruments internationally. The three vertex distance options of 0mm, 12mm, and 13.75mm support accurate measurement across different spectacle frame vertex distances. For institutional procurement managers, Medigear.uk provides procurement documentation and pre-purchase consultation for ophthalmology units evaluating the ARK-1800.

Optometry practices and refraction clinics benefit from the ARK-1800's icon-display menu on its 7-inch LCD/TFT monitor, which simplifies navigation and reduces the learning curve for new operators. The auto focus function automatically aligns and retrieves measurements without manual trigger input, supporting consistent throughput in high-volume examination sessions. The follow-up colourful fogging chart system provides an integrated fogging stimulus for the subjective refraction sequence, and the built-in thermal printer produces immediate result printouts without a separate printer. Medigear.uk supplies the ARK-1800 to optometry practices and distributors through its B2B procurement channel.

Cataract assessment units and specialist diagnostic suites benefit from the ARK-1800's corneal power range of 33.75 to 67.5D, corneal astigmatism up to 8D, and corneal diameter measurement from 2.0 to 14.0mm for keratometry in IOL calculation and refractive surgery screening.

Individual buyers and private clinics can acquire the ARK-1800 directly through Medigear.uk. The universal power supply supports installation in any clinical environment.

Hexagon Prism and High-Sensitivity CCD for Unmatched Accuracy

The ARK-1800 uses the same hexagon prism and high-sensitivity CCD optical architecture as the ARK-1500, delivering unmatched accuracy and reliability in refraction and keratometry measurements. This optical system provides consistent measurement results across a wide range of clinical presentations, including smaller pupils and mild media changes, supporting confident use in both routine optometry and specialist ophthalmic examination settings. The hexagon prism CCD combination is the primary optical differentiator of the ARK-1800 and ARK-1500 instruments available from Medigear.uk relative to Hartman imaging-based refractometers.

Universal 100–240V Power Supply for International and Multi-Site Deployment

The ARK-1800's universal 100V to 240V power supply eliminates electrical compatibility barriers for deployment across all national electrical supply standards without transformer conversion. This universal range covers every standard from 100V 50Hz through to 240V 50Hz, making the ARK-1800 the appropriate choice over the ARK-1500 (220V ±10% only) for NHS trust procurement managers with multi-site estates including buildings with different supply specifications, and for distributors supplying the instrument internationally across different voltage territories.

Auto Focus for Fully Automatic Measurement Acquisition

The ARK-1800's auto focus function requires only that the instrument be moved into position — alignment and measurement acquisition are then fully automatic without any operator input. This one-move automatic acquisition eliminates the alignment judgement and trigger timing steps associated with manual refractometers, reducing per-patient examination time, removing operator variability from the measurement process, and making the instrument accessible to operators at all experience levels. The auto focus architecture supports reliable high-throughput examination in busy NHS and private clinical sessions.

7-Inch LCD/TFT with Icon-Display Menu for Easy Operation

The 7-inch LCD/TFT monitor presents measurement results and all instrument settings through an icon-display menu, providing an intuitive navigation interface that reduces the reading burden associated with text-only menus. The icon-based display supports confident instrument navigation for operators who use the ARK-1800 intermittently or who are new to ARK instrumentation, and the 7-inch screen size provides clear readout of measurement values, stored data, and comparison tables during the examination session.

Three Vertex Distance Options for High-Power Prescription Accuracy

Three vertex distance selections — 0mm, 12mm, and 13.75mm — allow the refraction measurement to be matched to the patient's actual spectacle frame vertex distance. This selection is particularly important for high-power myopic and hyperopic prescriptions where vertex distance significantly affects the effective lens power at the eye, and it supports more accurate dispensing for patients with high prescriptions compared with instruments offering only a single fixed vertex distance.

Corneal Diameter Measurement: 2.0 to 14.0mm

The ARK-1800 measures corneal diameter from 2.0 to 14.0mm in 0.1mm increments within the same examination sequence, supporting phakic IOL sizing, contact lens base curve selection, and anterior segment anatomy documentation without a separate measurement instrument. This corneal diameter measurement parameter extends the clinical utility of the ARK-1800 beyond standard refraction and keratometry, supporting the full anterior segment assessment requirements of specialist and cataract examination suites.

Follow-up Colorful Fogging Chart System

The integrated follow-up colourful fogging chart provides an automated fogging stimulus within the instrument's display for use in the subjective refraction fogging technique, reducing the risk of accommodative over-correction during fine refraction. The colourful presentation supports more effective patient engagement than standard monochrome chart alternatives, and the follow-up design bridges the transition from objective ARK measurement through to subjective refraction refinement within the same examination session.

Built-in Thermal Printer for Immediate Result Documentation

The ARK-1800 includes a built-in thermal printer for immediate printout of measurement results at the point of examination without requiring a separate printer connection or paper handling between patients. This integrated printer supports prompt result documentation for patient records and eliminates manual result transcription from the display screen. Medigear.uk can confirm the thermal paper supply and replacement specifications for the ARK-1800 on request.

Sphere Measurement: 20D to +20D, Two Step Sizes, Three VD Options

Sphere is measured from -20D to +20D at selectable VD of 0mm, 12mm, or 13.75mm in 0.12 or 0.25D steps. The two step sizes support both fine refraction protocols and standard dispensing within the same instrument configuration.

Cylinder Measurement: 8D to +8D, Two Step Sizes

Cylinder is measured from -8D to +8D at VD=12mm in 0.12 or 0.25D steps, covering high astigmatism in specialist presentations. Cylinder form is selectable as minus, plus, or combined.

Axis Measurement: 0° to 180°, 1° Step

Axis covers 0° to 180° in 1° steps for both refraction and keratometry, providing the precision required for spectacle dispensing and toric IOL positioning.

Pupil Distance: 45 to 88mm, 1 mm step

Pupil distance spans 45 to 88mm in 1mm steps, covering monocular and binocular PD for all standard adult dispensing requirements. Minimum pupil size for measurement is 2.0mm.

Corneal Power: 33.75 to 67.5D, Refractive Index 1.337

Corneal power spans 33.75 to 67.5D based on refractive index 1.337, with selectable increments of 0.12 or 0.25D. This range covers flat post-refractive surgery corneas through to steep keratoconic corneas.

Corneal Astigmatism: 0.0 to 8.0D

Corneal astigmatism covers 0.0 to 8.0D with selectable increments of 0.12 or 0.25D, accommodating mild regular through to high astigmatism scenarios.

Corneal Diameter: 2.0 to 14.0mm, 0.1mm Increment

Corneal diameter is measured from 2.0 to 14.0mm in 0.1mm increments, supporting phakic IOL sizing, contact lens fitting, and anterior segment anatomy documentation.

Radius of Curvature: 5.0 to 10mm

Radius of curvature spans 5.0 to 10mm. The listed increment is 1mm — buyers should confirm the precise increment with Medigear.uk for applications requiring sub-millimetre radius resolution.

Display: 7-inch LCD/TFT with Icon-Display Menu

The 7-inch LCD/TFT provides clear measurement display with an icon-based menu system for easier operation and setting, reducing operator training requirements and supporting confident navigation for all experience levels.

Power Supply: 100V to 240V, 50Hz, 60VA

Universal voltage compatibility from 100 to 240V at 50Hz supports deployment across all international electrical supply standards without transformer conversion. This is the primary electrical specification advantage of the ARK-1800 over the ARK-1500.

Dimensions and Weight: 64 cm × 52 cm × 66 cm, 16 KG

The ARK-1800 occupies a 64 × 52cm footprint at 66cm height and weighs 16KG, requiring a sturdy examination desk or instrument table. Packing dimensions are confirmed through Medigear.uk.

Built-in Thermal Printer

Integrated thermal printing produces immediate result printouts at the examination station without a separate printer connection or manual paper handling between patients.

The ARK-1800 auto refractometer keratometer provides a validated, full-function refraction and keratometry platform suited to hospital ophthalmology departments, NHS eye clinics, optometry practices, and specialist ophthalmic examination suites requiring accurate sphere, cylinder, corneal power, and corneal diameter measurement. Its hexagon prism and high-sensitivity CCD, sphere range of 20D, cylinder up to 8D, corneal power from 33.75 to 67.5D, corneal diameter measurement, universal 100 to 240V power supply, 7-inch LCD/TFT monitor with icon menu, follow-up fogging chart, and built-in thermal printer collectively address the requirements of institutional procurement teams, independent practice owners, and specialist distributors. Full documentation is available from Medigear.uk. Contact Medigear.uk for specifications, procurement assistance, or expert consultation.