A nurse is collecting data from a school-age child who reports difficulty seeing the chalkboard in the front of the classroom. Which of the following tests should the nurse assist with performing.

Choice A rationale Identifying items in a book assesses near vision and the ability of the lens to accommodate. This test is primarily used to detect hyperopia or presbyopia rather than distant vision issues. While it evaluates the function of the ciliary muscles and lens elasticity, it does not address the child's specific complaint of being unable to see a distant chalkboard, which suggests a refractive error related to distance. Choice B rationale Ishihara plates are specifically designed to evaluate color vision by requiring the identification of numbers or shapes within a field of multicolored dots. This test screens for congenital or acquired color blindness by assessing the function of the cone cells in the retina. It does not measure visual acuity or the ability to see distant objects clearly, and therefore would not help diagnose the child's difficulty seeing the chalkboard. Choice C rationale The Snellen eye chart is the standard clinical tool used to measure distance visual acuity. Myopia, or nearsightedness, occurs when the eyeball is too long or the cornea is too curved, causing light to focus in front of the retina. By asking the child to read letters from a distance of 20 feet, the nurse can objectively determine if the child has a refractive error that prevents clear distance vision. Choice D rationale Instructing the child to track items in the room evaluates extraocular muscle function and cranial nerve integrity. This test, often called the six cardinal fields of gaze, assesses the coordination of the eyes and the ability of the muscles to move the globe in various directions. While it is a vital part of a comprehensive eye exam, it does not provide information regarding the clarity of distant images or refractive status.