---
title: Automatic Start
description: "## Automatic Start of the Optonet Vision Unit Below are the instructions to configure the Optonet Vision Unit so that the ETDRS VA optotype automatically starts in full-screen mode when the computer is turned on. Please remember that Chrome browser…"
url: "https://optonet.es/docs/automatic-start/?lang=en"
updated: "2026-01-28"
category: Getting Started
---

# Automatic Start

## Automatic Start of the Optonet Vision Unit

Below are the instructions to configure the Optonet Vision Unit so that the ETDRS VA optotype automatically starts in full-screen mode when the computer is turned on. Please remember that Chrome browser must always be used.

### Shortcut

First, locate the shortcut icon for the Vision Unit. Right-click on it and select **“Properties.”**

  ![Properties](https://optonet.es/wp-content/uploads/2024/11/Properties.png)

### Shortcut Configuration

The Properties window will appear. Locate the text in the **“Target”** field, select all the text, cut it using the right-click menu, and paste it into any text document.

  ![Properties1](https://optonet.es/wp-content/uploads/2024/11/Properties1-1.png)

The copied text will look something like this:

```
“C:Program FilesGoogleChromeApplicationchrome_proxy.exe”
-- profile-directory=Default --app-id=ejdgcfnpomfdeakdalnfhfmlacjnliap
```

You will notice that the target text consists of two parts: the first in **blue**, enclosed in quotation marks (“ ”), and the second in **red**, starting with a double dash (- -).

Replace the red text, which begins with the double dash, with the following:

```
--start-fullscreen https://optonet.vision/?nav=L3JlZnJhY2Npb24vc2xvYW4%3D
```

The final result will look like this:

```
“C:Program FilesGoogleChromeApplicationchrome_proxy.exe”
--start-fullscreen https://optonet.vision/?nav=L3JlZnJhY2Npb24vc2xvYW4%3D
```

Now, copy the entire updated text back into the **“Target”** field and click the **“Apply”** button.

  ![Properties2](https://optonet.es/wp-content/uploads/2024/11/Properties2.png)

If configured correctly, clicking on the desktop shortcut icon will now open the Vision Unit in full-screen mode with the ETDRS VA optotype.

### Open the Vision Unit When Starting the Computer

Finally, to ensure the Vision Unit opens automatically when the computer starts, follow these steps:

- Open the Windows search bar and type **"Run."**

  ![run](https://optonet.es/wp-content/uploads/2024/11/run.jpg)

- The **Run** window will open. Type the following command into the text field and click **"OK": shell:startup**

  ![shell](https://optonet.es/wp-content/uploads/2024/11/shell.jpg)

- The Windows **Startup** folder will then open.

  ![startup](https://optonet.es/wp-content/uploads/2024/11/startup.jpg)

- Copy the shortcut icon for the Vision Unit into the Startup folder. To do this:

Select the shortcut icon.

Right-click on it and choose **"Copy."**

Paste it into the Windows Startup folder.

  ![startup_optonet](https://optonet.es/wp-content/uploads/2024/11/startup_optonet.jpg)

With this setup, the Vision Unit will open automatically in full-screen mode when the computer and Windows start.