The assessment of a 4-year-old child's visual acuity demonstrates 20/30 vision in the left eye and 20/40 vision in the right eye using the Snellen eye chart. This means:

that vision is normal for age.

that vision is abnormal and further testing is warranted.

the patient may not be able to read and should be tested with the picture or "E" eye charts.

an astigmatism is present.