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# How to set up the prescription option/button for my contact lens  products?

**Here's how you do it (step by step)**

* Go to the **App settings** and navigate to the **Rules **section.

* Click on **Add Rule** to create a new rule.

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot47_1b8jznw.png)

* Name your rule to identify it easily.

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot49_1r1wksr.png)

* Select the products to which you want to apply this rule.

*  Choose the options where,  how you want to appear  products on cart page for Left & Right eye.

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot50_1d392ng.png)

*  Add options for the prescription. You can either choose a **default template** or create a new option by clicking on **Add New** and then customize it as needed.

*  Once you've configured the options, click on **Add Rule**  to save the changes.

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot51_z6wbbd.png)

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot52_dtl8ym.png)

Verify the settings on your store to ensure that the prescription features are displaying correctly.

**Result:**

![](https://storage.crisp.chat/users/helpdesk/website/ec822f1cb1c6a000/screenshot53_1xospgy.png)

Following these steps will allow you to set up the prescription option/button for your products effectively. 
If you encounter any issues or need further assistance, feel free to reach out to us. We're here to help!