Auto ref-keratometer VRK-2400

Auto ref-keratometer VRK-2400

Product Code:vrk-2400
Availability:In Stock

Not only the usual refractometry and keratometry, but also corneal diameter and base curve of contact lens can be measured with this one instrument. Thus, measurements of eye and prescriptions for glasses and contact lenses can be made more efficiently.

Refraction & Keratometry Measurement

VRK-2400 provides an extensive range of dioptric measurement range. It covers -25D to +22D, and the radius of curvature for keratometry is 5.0mm to 10.2mm. Owing to its easy alignment and friendly operation you can measure the refraction and keratometry in a sequency, the results can be checked all at once.

Diameter Measurement

Using the VRK-2400's Freeze Function, you can measure the diameter of the cornea, pupil or hard contact lenses worn by process is both easier and more precise.

Colored picture notice table

A wide visual field angled color picture notice table makes easy to fix patients' eye through making patients confortable. An auto cloud and mist function is helpful t ochildren or damaged eyes because it affects to machinery near vision and patients control.

Auto PD Measurement / Automatic power saving

It can measure and indicate pupils' distance can be measured automatically by using measurement of reflection eyes. 

If VRK-2400 not used over 5 minutes, it shut off from electric power saving function eliminates current to the TV monitor and lighting circuitry. It conserves energy and prevents any build-up of heat from electronic circuitry, increasing its useful life.

VRK-2400's friendly convinient fuctions

CLBS (Contact Lens Base Curve)

CLBS supports easy to measure posterior curve of hard contact lens.

Operation layer

VRK-2400 provides intuitive user interface and it contains a fixed gripe of stage and a power sign light. 

Easy handling joystick

It can be measured by only one hand. Even novices can use it with precise results.

Direct results indication
Through monitor, you can see the results(maximum of 10 data for each eye) of measurements stored in memory.


Built-in printer provides fast and perfect clear paper that is placed VRK-2400's front-right side.

Transmission of data

measured data an be delivered to the external instrument (PC, phoropter) through RS-232.





Vertex Distance(VD)            0.0, 12.0, 13.5, 15.0


Sphere Power(SPH)            -25.00 ~ +22.00D (at the vertex distance of 12 mm)

                                   (Increments selectable between 0.12 and 0.25 D)


Cylinder Power(CYL)            0.00~ ±10.00D (Increments selectable between 0.12 and 0.25 D)


Axis(AX)                           1~180˚ (Increments: 1˚)


Cylinder Form                    -,+,MIX


Pupil Distance(PD)              10~88mm


Minimum Pupil Diameter        ∮2.0mm






Radius of Curvature              5.0~10.2mm (Increments: 0.01 mm)


Corneal Power                    33.00 ~ 67.50D (when cornea equivalent refractive index is 1.3375)

                                    (Increments selectable from 0.05, 0.12, 0.25 D)


Corneal astigmatism               0.00 ~ -15.00D (0.05 / 0.12 / 0.25D 단위)


Axis                                 1 ~ 180˚ (Increments: 1˚)


Corneal Diameter                  0.8 ~ 14.0mm (Increments: 0.1 mm)


Memory of Data                    10 measured value for each right and left eye

Internal Printer                      Uses thermal line printer 


Monitor                               5.7-inch TFT LCD monitor


External Interface             


      VGA Video Output:                Connected with Monitor via VGA Cable.

                                            RGB video signal plus option H and V sync


      RS-232 Interface                    Connected with PC or PAV-6100 via RS232 Cable.

                                             RS232 Signals are r± 15[V] with Maximum 100mA


     USB B Type                          Connected with PC via USB Cable.

                                            USB Signals are 5.00±0.25[V] with Maximum 500-900[mA]


Environmental requirements:   


    Operation                          Temperature: +10 to +40℃



                                         Humidity: 30 to 85% RH


                                         Atmospheric pressure : 70 to 106 kPa


     Storage and Transportation     Temperature: -10 to +55℃


                                         Humidity: 10 to 95% RH


                                         Atmospheric pressure : 50 to 106 kPa


Power supply                             AC100-240V, 50/60Hz   


Power consumption                      40 ~ 55 VA


Size                                        273(W) ´ 501(D) ´ 473(H) mm

Weight                                     Approximately 20kg 

Tags: Auto, ref-keratometer, VRK-2400