If the patient is unable to see the largest line of the Snellen chart, what should you do next?

Documenting the result as >20/400 for the appropriate eye is an essential step when a patient is unable to see the largest line of the Snellen chart. This notation indicates that the patient's visual acuity is poorer than what is typical for a standard measurement at 20 feet.

This action is important as it establishes a clear record of the patient's vision status at the time of the examination. It also sets a benchmark for future assessments, ensuring that any changes in the patient's vision can be effectively monitored over time. Additionally, documenting visual acuity in such a manner is critical for proper referral processes, insurance purposes, and understanding the patient's overall eye health.

Other options may not provide the immediate clarity needed for documentation. Referring a patient to a specialist or recommending a return for re-examination could be valid steps depending on the overall clinical context, but the primary focus should be on accurately documenting the patient's current visual capabilities. Providing glasses may also be a possible solution, but without a proper understanding of the patient's vision, it may not be the appropriate next step. Therefore, documenting the visual acuity accurately is the most critical and immediate action to take in this scenario.