> For the complete documentation index, see [llms.txt](https://pb-apps.gitbook.io/lool/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pb-apps.gitbook.io/lool/how-to/how-to-use-sph-cyl-add-on-contact-lens-prescription-form.md).

# How to use SPH,CYL,ADD on contact lens prescription form?

1. **nav to "Translations" tab, and change "Power" to "SPH", "Base Curve" to "CYL", "Diameter" to "ADD"**

<figure><img src="https://726787322-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJfHIPqiZSixmeDOB7MdE%2Fuploads%2Ffxfx2HF6h0t0FcD9GhCp%2Fimage.png?alt=media&amp;token=6d013e38-f4c1-4168-94fb-19bbef8f8d70" alt=""><figcaption></figcaption></figure>

2. **nav to "Form", add your customize options to CYL and ADD**

<figure><img src="https://726787322-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJfHIPqiZSixmeDOB7MdE%2Fuploads%2FgnIy4g3cmRyTgT61aCZa%2Fimage.png?alt=media&amp;token=97043e96-84c6-4b9a-ab87-c420f1778888" alt=""><figcaption></figcaption></figure>

<figure><img src="https://726787322-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJfHIPqiZSixmeDOB7MdE%2Fuploads%2FnommEiS2BTfAFF5Q3rJP%2Fimage.png?alt=media&amp;token=1e57a338-3a48-4188-9ecb-11a891f59120" alt=""><figcaption></figcaption></figure>

3. **Save and preview your product**

<figure><img src="https://726787322-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJfHIPqiZSixmeDOB7MdE%2Fuploads%2FWdSWb5OyZd8t2nX7kyFp%2Fimage.png?alt=media&amp;token=2c85f30e-cc0e-4576-8346-3f181ca2f6e2" alt=""><figcaption></figcaption></figure>