Which of the following is NOT typically included in newborn screening tests?

Newborn screening tests are critical for the early detection of certain health conditions that could affect a child's long-term health and development. These screening tests usually include blood tests to identify metabolic or genetic disorders, and hearing tests to check for auditory issues that could interfere with speech and language development.

Vision tests, while important, are typically not included in routine newborn screening due to the difficulty of assessing vision accurately in newborns. Vision screening is generally performed later, as infants develop and are better able to respond to visual assessments.

Skin tests are also not part of the standard newborn screening battery. Instead, they may be utilized in specific cases to check for conditions such as jaundice or various infections but are not routinely included in the initial screening process.

Thus, the choice that is not typically part of standard newborn screening tests is vision tests, as routine vision assessments occur at later pediatric visits rather than immediately after birth.