This feature allows relative contrast from 0 to 30 percent and is a great way to test pre- and post-LASIK patients for contrast sensitivity, as well as cataract patients pre and post op, MS patients, and anyone needing another form of vision assessment. . Press ‘J’ to invoke this feature.  Routinely done by selecting a single row of 20/40 letters, the contrast is gradually reduced by using the – key on the remote until they can no longer see letters, then gradually step back up using the + key until just visible. 

Use red/blue glasses to check fixation disparity.  The fixation disparity ‘F2’ button is another dual-function button that toggles between a fixation disparity chart with a fusion lock and one without.

Some doctors prefer to use a vertical line of letters for phoria testing. Press ‘V’ to invoke this feature. Please note this feature is only available as 20/40.

Use the red/blue glasses or red/green (check preference in setup) to check binocularity with your patients.  It is a great way to check for malingering.  Acuity Pro provides the option to adjust the red/blue screen to get the perfect color block. 

This is a standard red/green overlay, which is available for all optotypes.  It can be used with single-letter, single-line, or multi-line displays, all letter sizes, and mirrored setups.

A single line of letters is displayed by pressing ‘L’. This feature works for all optotypes. The line can be shortened – or lengthened – one letter at a time by repeatedly pushing the ‘L’.

Depending on optotype size, up to 4 lines of letters can be displayed at one time. Multi-line is accessed by pressing ‘U’. Based on user request, choose 4, 3, or 2 lines of letters on the multi-line screen by pressing ‘U’ repeatedly to change the number of lines.

Press ‘O’ for ‘One Letter’ display. This feature works for all sizes and optotypes and is often used for ductions.

A standard white on black Fixation Dot is available by pressing ‘D’. It can be resized using the ‘+’ or ‘-‘ keys.

The Smart Randomization feature (Snellen chart only) creates a random line of letters that have a recognition difficulty equal to any other random line of letters.  Some Snellen letters are more difficult to recognize than others.  Examples of difficult letters to recognize are B and S.  Easy letters are T and L.  With Smart Randomization, each line is equally as difficult as any other random line. It makes acuity testing more accurate.  Also when randomizing, the default Snellen letter sequence is the first sequence presented for each Snellen size so you don’t have to worry about looking at the chart each time you change size.  Even if you have ‘Randomized’ the current display, when you change the letter size up or down, the standard sequence will be the first displayed for the next set of letters.  If you would rather have random letters ‘Always On’, just go into the control panel and check the ‘Always Random’ box.  This will always display a random letter sequence.

This feature puts a mini (sizeable) version of the Acuity Pro screen on the desktop monitor.  In a direct room, this allows the doctor to simply look at the desktop screen to see what is on the Acuity Pro screen.

Press ‘K’ to display the crowding bars around a single optotype.  This is the most accurate way to test acuity on an amblyopic eye. It adds “visual noise” to the single letter, simulating more than one letter being presented

Speedy Acuity was introduced by Acuity Pro per user request.  It provides a single or double column of descending size optotypes for that really quick acuity check. Press ‘Y’ to toggle between single and double column display. Randomization works well on this chart mode

For mirrored rooms, enable the Mirror Display feature in Preferences by pressing ‘H’ and clicking on the Mirror Display option. The chart is displayed in a reversed presentation. As opposed to mirrored rooms with a bulb projector, this feature requires only one mirror and it does not have to be a front surface mirror.

All optotypes can be displayed in LogMAR size and notation.  This feature can be set in Preferences by pressing ‘H’ and selecting LogMAR.

Introduced in Version 8, this user-requested feature provides three known letter sets for each line of letters.  For example, from the Snellen chart, press the ‘2’ on the remote or keyboard to display the default Snellen 20/20 line: T Z V E C L.  Press ‘2’ again, and L O Z B D E is displayed.  Press ‘2’ again, and 

V F N S P Z is displayed.  Press ‘2’ again, and you are returned to T Z V E C L.  This is great for straight room, single monitor, or All-In-One computer setups where the doctor is facing the patient and cannot see the screen without turning around.  Instead of pushing the random button, press the remote or keyboard key corresponding to the current acuity row to display a different line of letters that you know – but the patient doesn’t.

This user requested feature completely blacks the screen.  Instead of having to turn the  monitor off press ‘B’. We have also added a second screen, the ‘white out’ screen.  Press ‘B’ again to switch back and forth between black and white screens. This feature is also handy when patients are left in the room alone and want to play with the remote or the computer, since it appears it isn’t on.

The optotype size can be displayed using any of the four display options. Press ‘H’ to select.

You have the option of ANSI standard spacing for the displayed optotypes. Open Preferences by pressing ‘H’ and check the ANSI box.  All multi-line and single-line displays will be spaced according to the international ANSI standard, which means there is an equal amount of space between letters that is the width of letters on that line.

This feature displays a split-screen red/green field that contains two sets of concentric black circles.  This is for doing a red/green balance.

This customization helps make exams much more accurate for patients with low vision.

Mask a single line or single letter of the chart by pushing ‘M’. This feature reduces the brightness of the screen for patients with light sensitivity.