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ClearChart® 4
Family of Digital Acuity Systems 
ClearChart 4 • ClearChart 4X • ClearChart 4P

Pixel-perfect acuity testing and purpose-built in the USA.

The all-new family of ClearChart® Digital Acuity Systems from Reichert® are all-in-one, elegant, and simple-to-use. They are uniquely designed to meet all of your acuity testing needs with a wide selection of optotypes and other special test charts. The ClearChart 4 Digital Acuity System, ClearChart 4X Enhanced Digital Acuity System, and ClearChart 4P Polarized Digital Acuity System all feature a 24 inch, high resolution, LED backlit display, and are lightweight, cool-running, and long-lasting. Because Reichert is The Phoroptor® Company, ClearChart seamlessly connects to Reichert digital Phoroptors for the best possible refraction experience for both you and your patient.

New! ClearChart 4X now has LEA SYMBOLS® and LEA NUMBERS®!

Built for Acuity Testing

ClearChart® Digital Acuity Systems are all-in-one,  custom-built and engineered for all of your acuity testing needs. Utilizing an intuitive and stable operating system designed by Reichert, ClearChart ensures consistent and reliable performance over other  computer-based acuity systems. 

No Moving Fans or Spinning Hard Drives

Requiring no separate components or software, ClearChart Digital Acuity Systems are free of moving parts, noisy fans, and spinning hard drives providing cool-running, silent, and dependable operation.  

High Resolution LED Backlit

All ClearChart models feature a 24 inch, high resolution (1920x1080), LED backlit display with three different illumination levels for mesopic (3 cd/m2) and photopic (85 cd/m2) lighting conditions.

Wide Range of Optotypes

ClearChart has an extensive range of optotypes that are able to be randomized to prevent patient memorization. Optotypes can also be isolated, increased, or decreased in size, and can be displayed in either Snellen or Logmar progression. 

Optotypes include: 17 Letter Set, 8 Letter Set, Sloan, HOTV, Landolt C, Landolt C & O, Tumbling E, Children’s Optotypes. 

ClearChart 4X and ClearChart 4P also offer ETDRS and Contrast Sensitivity. 
Specialty test charts include Astigmatic Tests, Fusion and Phoria Tests, and Binocular Balance.

Intuitive Remote Control  

An easy-to-use, infrared remote control allows access to all features and functions from almost anywhere in the room.  

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Direct or Mirrored Configuration

ClearChart Digital Acuity Systems can be configured for standard or mirrored viewing to accommodate refracting distances from 6 ft to 24.6 ft (1.83 m to 7.5 m).

Easily Import Images and Videos

ClearChart 4X and ClearChart 4P users have the ability to add images and videos to customize their acuity system by simply importing files from a USB drive. 


Patient Education slides come standard with the ClearChart 4X and ClearChart 4P. 

Stereo Testing 

The ClearChart 4P features a linear polarized screen that has polarization angles of 45° and 135° using an articulating mount to provide proper viewing. Additional polarized charts are available in ClearChart 4P Polarized Digital Acuity System. 

Proudly made in the USA.

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