The nurse is preparing to examine a client's mouth floor. To move the tongue to one side for this examination, which tool should the nurse use?

Choice A reason:
Peripheral vision is the ability to see objects and movement outside of the direct line of vision. This type of vision is assessed using different methods, such as confrontation visual field testing, where the examiner moves objects into the patient's side vision from different angles. Standing 20 feet away from a chart would not be the appropriate method to assess peripheral vision.
Choice B reason:
The assessment of external eye structures involves examining the physical appearance and condition of the eyelids, sclera, conjunctiva, and surrounding areas. This is typically done at a close range and does not require the patient to stand at a distance from a chart. The nurse would inspect these structures directly, often with the aid of a penlight for better visibility.

Choice C reason:
Distant vision is the ability to see objects far away, and it is what the nurse is preparing to assess when the client is asked to stand 20 feet from a chart. This distance is standard for the Snellen eye chart, which is used to measure visual acuity. The chart has rows of letters that decrease in size, and the patient is asked to read the smallest line of letters they can see clearly. The Snellen chart is the most common method used by eye doctors to measure visual acuity.
Choice D reason:
Near vision is the ability to see objects that are close to the eyes clearly. It is assessed using different charts, such as the Jaeger eye chart, which contains blocks of text in various type sizes. The patient is asked to read the text at a close range, typically around 14 inches, not 20 feet. Therefore, standing 20 feet away from a chart would not be the method to assess near vision.

Choice a reason:
Eye malalignment is a general term that refers to any form of misalignment of the eyes, which can include esotropia but is not specific to it. Esotropia is a type of strabismus where there is a specific pattern of eye malalignment.

Choice b reason:
Eye turning outward is known as exotropia, which is the opposite of esotropia. In exotropia, one or both eyes turn outward away from the nose, which is not characteristic of esotropia.

Choice c reason:
Eye oscillating refers to nystagmus, a condition where the eyes make repetitive, uncontrolled movements, often resulting in reduced vision and depth perception. While nystagmus can occur in conjunction with esotropia, it is not a defining characteristic of esotropia itself.

Choice d reason:
Eye turning inward is the hallmark of esotropia. In this condition, one or both eyes turn inward towards the nose. It can be constant or intermittent and may affect one eye or alternate between both eyes. Esotropia can be comitant, meaning the degree of deviation is the same in every direction of gaze, or incomitant, where the deviation varies with gaze direction.