Keratometer ARK-4000s – Advanced Auto Refractometer for Accurate Eye Diagnosis
The Keratometer ARK-4000s Offer By Brightway Pakistan is a highly reliable fast, and precise optical diagnostic system designed for modern eye clinics, optical shops, and hospitals. This advanced device combines auto refractometry and keratometry in one smart platform, helping eye care professionals analyze refractive errors and corneal curvature with exceptional accuracy. Its intuitive interface, high-resolution imaging, and smooth performance make the ARK-4000s a preferred choice for ophthalmologists and optometrists across Pakistan.
Overview of Keratometer ARK-4000s
The Keratometer ARK-4000s brings innovation to clinical eye testing by offering quick measurements, stable results, and comfortable patient alignment. Its automatic tracking, intelligent focusing system, and advanced analytical software minimize manual effort. Whether you need dependable refractive measurements or precise corneal assessments, this machine delivers consistent and repeatable outcomes.
This model is especially beneficial for busy eye care setups where accuracy, speed, and patient comfort are top priorities.
Key Features of Keratometer ARK-4000s
1. Dual Function: Auto Refraction + Keratometry
The ARK-4000s performs complete refractive error testing while measuring corneal curvature simultaneously. This reduces testing time and ensures more comprehensive clinical decisions.
2. High-Resolution Optical System
Equipped with advanced optical lenses and sensors, the Keratometer ARK-4000s provides clearer, more stable, and highly accurate measurements even in challenging cases such as small pupils.
3. Auto Tracking & Auto Measurement
With automatic alignment and measurement capability, the device minimizes user dependency and ensures repeatable results. This is particularly helpful for new technicians and high-volume clinics.
4. Wide 7-inch LCD Touchscreen Display
Its user-friendly touchscreen allows easy operation, quick navigation, and enhanced workflow efficiency. Real-time data visualization helps clinicians discuss results instantly with patients.
5. Fast & Smooth Operation
The system is designed for quick capture and rapid data processing, ensuring minimal patient discomfort and maximum efficiency during busy clinical hours.
6. Ergonomic & Compact Design
The compact structure of the Keratometer ARK-4000s fits easily in small clinics or diagnostic rooms while providing a comfortable chin rest and forehead support for patients.
7. Built-In Printer & External Connectivity
It comes with a high-speed thermal printer for instant printouts and USB/RS connectivity for data transfer, EMR integration, and long-term record storage.
Technical Specifications of Keratometer ARK-4000s
Auto Refractometer Specifications
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Measurement Range (Sphere): –25.00D to +22.00D
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Cylinder Range: 0 to ±10.00D
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Axis Range: 0° – 180°
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Pupil Size Measurement: 2.0 mm – 8.0 mm
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Minimum Readability: 0.01D for more precision
Keratometry Specifications
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Radius of Curvature: 5.5 mm – 10.0 mm
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Keratometry Range: 33.00D – 67.50D
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Astigmatism Display: Cylinder and axis included
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Corneal Diameter Measurement: 2.0 – 12.0 mm
Display & Interface
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Screen: 7-inch LCD color touchscreen
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Measurement Mode: Auto / Manual
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Display: Real-time eye image with focus target
Printer & Connectivity
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Printer: Built-in high-speed thermal printer
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Ports: USB, RS232, and external storage options
Power & Environmental Conditions
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Power Supply: 100–240V, 50/60Hz
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Operating Temperature: 10°C – 40°C
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Humidity: 30% – 90%
Uses of Keratometer ARK-4000s
1. Ophthalmology Clinics
The Keratometer ARK-4000s is ideal for routine eye examinations, pre-surgical evaluations, and precise refractive assessment.
2. Optometry Centers
Optometrists rely on this device for accurate refractive error detection before prescribing glasses or contact lenses.
3. Optical Shops
It helps optical retailers measure customer eye power quickly and accurately, ensuring high-quality optical solutions.
4. Hospitals & Diagnostic Centers
Suitable for large hospitals and diagnostic chains requiring fast and dependable eye measurement systems.
5. Pre-LASIK & Cataract Evaluation
The corneal curvature data from the ARK-4000s supports refractive surgery planning and cataract lens selection.
Why Choose Keratometer ARK-4000s?
The Keratometer ARK-4000s stands out for its reliability, stability, and advanced functionality. Eye care professionals choose this model because it delivers:
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Highly accurate measurements
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User-friendly interface
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Faster patient handling
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Consistent, repeatable results
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Durable build quality
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Affordable price and low maintenance
Whether you run a clinic, optical shop, or hospital, the ARK-4000s improves diagnostic quality and enhances workflow efficiency.


