# Starting a Vision Test

To start a vision test, use the `startVisionTest` mutation. It supports a variety of contacts and glasses prescription renewal scenarios, including:

- Providing prescription details on behalf of the user when starting a vision test


[Click here to see the startVisionTest GraphQL reference](/reference/visibly-api/mutations/startVisionTest)

## Providing contact lens prescription details to the `startVisionTest` mutation

Query:


```graphql
mutation StartVisionTest($tags: [TagInput], $contacts: ContactsInput) {
  startVisionTest(tags: $tags, contacts: $contacts) {
    launchUrl
    jobId
  }
}
```

Variables:


```json
{
  "contacts": {
    "prescription": {
      "patient": {
        "firstName": "Jane",
        "lastName": "Test",
        "email": "test@test.com",
        "dateOfBirth": "2000-01-01",
        "state": "IL"
      },
      "products": {
        "right": {
          "baseCurve": "8.4",
          "diameter": "14.0",
          "productId": "29986",
          "sphere": "-3.75",
          "quantity": 1,
          "packageSize": 6
        },
        "left": {
          "baseCurve": "8.4",
          "diameter": "14.0",
          "productId": "29986",
          "sphere": "-3.75",
          "quantity": 1,
          "packageSize": 6
        }
      }
    }
  },
    "tags": [
    {
      "name": "orderId",
      "value": "123456"
    },
    {
      "name": "customerId",
      "value": "abcdefg"
    }
  ]
}
```

## Providing glasses prescription details to the `startVisionTest` mutation

Query:


```graphql
mutation StartVisionTest($glasses: GlassesInput, $tags: [TagInput]) {
  startVisionTest(glasses: $glasses, tags: $tags) {
    launchUrl
    jobId
  }
}
```

Variables:


```json
{
  "glasses": {
    "prescription": {
      "patient": {
        "firstName": "Jane",
        "lastName": "Test",
        "email": "test@test.com",
        "dateOfBirth": "2000-01-01",
        "state": "IL"
      },
      "corrections": [
        {
          "right": {
            "sphere": "-1.00",
            "cylinder": "-0.50",
            "axis": "120",
            "addition": "+2.00"
          },
          "left": {
            "sphere": "-1.00",
            "cylinder": "-0.50",
            "axis": "120",
            "addition": "+2.00"
          }
        }
      ]
    }
  },
  "tags": [
    {
      "name": "orderId",
      "value": "123456"
    },
    {
      "name": "customerId",
      "value": "abcdefg"
    }
  ]
}
```