Optonet Vision Unit Documentation

Please note that this User Guide is being currently updated; new sections will be added shortly.

1.4.Step 4. Control of Menus and Charts #

As any digital device, Optonet can be handled with a mouse and/or a keyboard.

Mouse: it is useful when the OVU is in a computer (e.g., for vision training or for teleconsultations), but not a practical option for distant vision charts.

Keyboard: a hand-held wireless mini keyboard is a popular option for distance vision testing in clinic and domiciliary. The four arrows, together with Intro and Page Down / Page Up keys (for Sequences) are enough to manage most common functions.

Also each function has been assigned a key from the keyboard. When you open the Right Menu in a tests and hover the mouse over any button, it will display the key assigned to that function.

E.g.: Pressing “M” opens the Charts Menu, then the arrows will take us from test to test, and Intro/OK will select one. All these keys are easily accessible in wireless mini keyboards, like the one shown here:

TV streaming Remote: TV streaming media players include a remote controller that we have programmed for easy managing of OVU menus. The following image represents an example with the functions assigned to each button*:

Android TV Remote Controller

Tablet (or phone) as a remote controller: Likely the most popular option to manage distance vision charts is from a tablet that has been paired through internet/router connection. The menus displayed on the tablet are visual and intuitive, and the same tablet can later be used to display near vision charts (near vision tests can be handled directly by touch screen on a tablet or phone).

A phone can also be used as remote controller, but you may find it a bit small for comfort. All the following instructions referring to tablets are also valid for phones.

To activate a tablet as a remote controller:

– Download the Optonet Vision Unit app in the tablet from its store. You will need your login details to open it.

– Open the menu on the left in the tablet and click on the option: Start Remote mode (see image below). It will show a long IP number.

– In the distance vision unit open the option: Connect Remote from the left menu; and then introduce the IP number displayed on the tablet and press Connect:


Note for Windows: The first time a remote connection is established in Windows using Chrome the browser will ask permission to connect with the tablet (just the first time).

To grant permission, click on the blue link that appears in the window (see image above) to open a new tab in the browser (Chrome), which displays a somewhat awkward message:

Click on Advanced and then on “Proceed to (IP number) (unsafe)”. You will be directed to a blank Screen with a message that seems a bit odd: “404 WebSocket Upgrade Failure”. This means the connection has been successfully authorized.

That is all! Close that Chrome tab, to go back to the distance vision unit and click again on Connect (if you were in full Screen mode, you will need to press F11 first).


Handling Distance Vision Tests

From here onwards, you can navigate through the menus from the tablet, which will automatically synchronize with the charts displayed for distance vision testing. Once in a test, the right side of the tablet displays the options for that test, whilst the left displays the same image shown to the patient on the distance vision screen.

The small tab on the top gives access to the Charts Menu, whilst the one on the left opens the Main Menu. Gestures can also be used with the tablet as a remote controller.

These are the gestures you can use:: 

On subsequent connexions between both devices, just press Start Remote mode on the tablet, and Connect Remote on the distance vision screen (alternatively, you can press the combination of keys: (Ctrl) + (Y) on the distance vision device keyboard.

The IP address gets automatically stored in memory.

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