LED Chart Monitor - VS C920 (17 inch)


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17 inch LED backlit screen, New CNT Test, all tests icons are listed on home interface, Quick test list, V style optotype arrangement, release C920 software update every two months.

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• 17 inch LED backlit screen
• New CNT Test, which is more scientific, effective, and directive. CNT curve will be formed and displayed on the screen when the test is finished.
• Better user experience -- All tests icons are listed on home interface.
• Quick test list -- Pick ten (or less) frequently used tests to establish your own quick test list.
• V style optotype arrangement -- Avoid optotypes congested on the screen.
• Excellent programming give full play to the features of CPU.
• We will release C920 software update every two months, please stay tune on us for getting a better operating experience.



The built-in software of C920 is developed on Linux platform. All the optotype and charts are vectorgraph. In order to be adaptable to various clinical conditions and offer a better operating experience to customers, we designs a user-friendly parameter setting interface of C920.

Change the Parameters,
What you do: press a button on remote controller.
What C920 does: redraw the optotypes and charts on base of defined parameter.

• Two languages, English and Chinese, are avaible currently.
• Working distance can be flexibly adjusted according to user's needs.
• Various visus units for different operator.
• Red & Green value can be set real time according to the clinical condition.
• Reversible optotypes and charts for mirrored room.
• Size of image can be changed freely according to the working distance.
• Screen Saver and Standby function are available.
• Gamma Calibration function brings the professional contrast sensitivity measurement.
• Software upgrade provided for free during the lifetime of C920.




With the wall bracket, C920 can be installed on the wall. The wall bracket is adjustable from 0 to 180 both horizontally and vertically.

C920 with the wall bracket


With two external ports on C920 provided for SD Card and USB flash disk connection, the user
♦ Can run the automatic update procedure.
♦ Video playing and image browing. (Support more formats of videos and pictures: video of AVI, MKV and MP4 format, image in gif, bmp, jpg, png format)

C920 external




• Type: 17-inch XGA Panel with LED backlit screen.
• Resolution: 1280×1024 pixels
• Brightness: 200cd/m² (min)


• Optotypes: Tumbling E, Landolt C, Alphabet, Numbers, Children, Allen.
• Mask Type: Single Mask, Horizontal Mask, Vertical Mask, White/Black Mask, Red/Green Mask.
• Special Chart: ETDRS, Contrast Sensitivity Test, Contrast Test, Ishihara, Cross Cylinder, Astigmatic Fan Dial, Cross Grid, Fixation Spot Test, Stereo Test, Red/Green Panel, Worth Four-Dot Test, Red/Green Balance, Traffic Light, Horizontal Coincidences, Vertical Coincidences, Schober.
  Low vision chart (E, C, Alphabet, Number, Children, Allen pictures), "V" Style Optotypes.

Other Functions

Video Playing, Image browsing, Randomization Optotype Playing, Mirror function, Screen function, Standby function.

Visus Unit

• Decimal: 0.04~2.0
• Snelle(ft): 20/500~20/10
• Snelle(m): 6/150~6/3
• LogMAR: -0.3~1.4
• 5-Grade: 3.6~5.3

Working Distance

• 2m-7m (in steps of 0.1m) 6ft-24ft (in steps of 0.5ft)
• Low vision chart: 0.6m-1.5m, in step of 0.1m

Power Supply

• Input: 100-240V AC, 60/50Hz
• Consumption: 20Walt (max)

Remote Controller

IR Remote, 2*AAA Batteries


• Dimension: 540mm×420mm×210mm
• Gross Weight: 6kg
• Net Weight: 2.5kg

Standard Accessories

Remote Controller, Wall Bracket, Red/Green Glasses, Optotypes Card, Power Cable, AC-DC Adapter

C920 Standard accessories

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