What should a patient wear during the FDT screening?

During the Frequency Doubling Technology (FDT) screening, it is essential for patients to wear their distance prescription if they have one. This is because the FDT test evaluates the integrity of the visual pathways and is designed to assess the threshold for detecting visual stimuli at various frequencies. The test is typically conducted under conditions where the visual acuity should be optimized, which is why the distance prescription is necessary.

Wearing the appropriate distance correction ensures that the patient can see the test targets clearly at the required distance, which is crucial for obtaining accurate and reliable results. If a patient were to wear reading glasses or no correction at all, it could compromise their ability to accurately perceive the test stimuli, potentially leading to false negatives or positives in the screening. Therefore, ensuring optimal vision with the correct distance prescription is critical for the effectiveness of the FDT screening process.