# Eye Surface Type Debug Node
Debug node that allows you to visually validate the current pupil radius.
## Render pipeline compatibility
| **Node** | **Universal Render Pipeline (URP)** | **High Definition Render Pipeline (HDRP)** |
| ------------------------------- | ----------------------------------- | ------------------------------------------ |
| **Eye Surface Type Debug Node** | No | Yes |
## Ports
| name | **Direction** | type | description |
| ---------------- | ------------- | ------- | ------------------------------------------------------------ |
| **PositionOS** | Input | Vector3 | Position in object space of the current fragment to shade. |
| **EyeColor** | Input | Color | Final Diffuse color of the Eye. |
| **IrisRadius** | Input | float | The radius of the Iris in the used model. For the default model, this value should be **0.225**. |
| **Pupil Radius** | Input | float | Radius of the pupil in the iris texture as a percentage. |
| **IsActive** | Input | bool | Flag that defines if the node should be active. |
| **SurfaceColor** | Output | Color | Final Diffuse color of the Eye. |