Patient Education to Improve VF Performance and Reduce Anxiety

This audio article is from VisualFieldTest.com.Read the full article here: https://visualfieldtest.com/en/patient-education-to-improve-vf-performance-and-reduce-anxietyTest your visual field online: https://visualfieldtest.comSupport the show so new episodes keep coming: https://www.buzzsprout.com/2563091/supportExcerpt:Patient Education to Improve Visual Field Test Performance and Reduce Anxiety Visual field testing—also called perimetry—is essential for detecting and monitoring glaucoma, optic nerve disease, retinal disease, and some neurological conditions. During standard automated perimetry, one eye is tested at a time while the patient looks at a central target and presses a button whenever a light is seen in the surrounding area. The test estimates how sensitive different parts of the visual field are. () Because the test depends on attention, understanding, fixation, and timely responses, patient education can directly affect the quality of the result. Anxiety, fatigue, unfamiliarity, incorrect responses, and difficulty maintaining fixation may lead to unreliable findings or unnecessary repeat testing. In a prospective study, higher pre-test anxiety was associated with greater visual field unreliability, while patients who had completed more than 10 previous tests reported substantially less anxiety. () Why Patient Education Matters A patient does not need to see every light to perform well. The goal is to respond accurately to the lights that are visible and to avoid pressing the button simply because a light is expected. Education helps patients understand that: The lights vary in brightness. Some lights will be too dim to see. Missing occasional lights is expected. The patient should look at the central fixation target rather than chase peripheral lights. Blinking is allowed. A short pause can usually be requested if the patient becomes tired or uncomfortable. The test is not an examination that can be “failed” through one or two missed responses. A learning curve is common. Repeated testing can improve attention, response timing, and understanding of the procedure, although a better result after practice does not necessarily mean that the eye itself has improved. () Educational Interventions That Improve Performance Short Educational Videos A three- to five-minute video can show the patient what the instrument looks like, where to look, how the button works, and what the flashes will feel like during the test. A randomized study of 244 patients undergoing their first automated visual field test used a 4.5-minute educational video. Reliable results in both eyes were obtained in: 75.9% of patients who watched the video 61.4% of patients who received usual instruction without the video This was an absolute improvement of 14.5 percentage points. The main benefit occurred in the second eye tested: reliability was 86.6% with the video versus 73.5% without it. () A later quality-improvement audit used a 4.5-minute video in patients with no previous experience of standard automated perimetry. Reliability increased from 66.7% before the intervention to 87.5% afterward, an improvement of 20.8 percentage points. The video explained fixation, blinking, the changing brightness of the lights, and when to request a pause. () The video should be: Short enough to watch immediately before testing Available in the patient’s preferred language Demonstrated from the patient’s viewpoint Focused on behavior rather than disease terminology Followed by an opportunity to ask questions Interactive Demonstrations An interactive demonstration can be more effective than spoken instructions alone because it allows the patient to see and rehearse the exact task. A useful demonstration may include: A central fixation target A simulated peripheral flash A button response Examples of lights that are easy to see and lights that are barely visible A brief example showing that the patient should not move the eyes toward the flash A demonstration of normal blinking and pausing Direct research on a separate interactive perimetry simulator is still limited. However, studies comparing video and spoken instruction consistently suggest that visual explanation improves understanding and confidence. In one prospective study of 120 patients with no previous experience of the test, patients receiving video instruction had better reported relaxation and motivation than those receiving verbal instruction alone. () Teach-Back and Short Practice Questions After a video or demonstration, the technician can ask the patient to explain the procedure in their own words. This is called teach-back. Useful questions include: “Where will you look during the test?” “When should you press the button?” “What should you do if you do not see a light?” “Are you allowed to blink?” “What should you do if you become tired?” In the 2022 educational-video audit, patients completed a seven-question assessment. Among patients with unreliable tests, 76.9% scored fewer than four correct answers. Every patient who scored more than four correct answers had a reliable result. This finding shows a strong association between understanding and test quality, although it does not prove that the quiz alone caused the improvement. () Practice Tests A short practice exercise can reduce the unfamiliarity that makes the first test stressful. A practice exercise should be clearly labeled as training only, not as a clinical result. In a study of 55 healthy adults with no previous perimetry experience, the median test duration decreased from: 5.7 minutes during the first test 5.3 minutes during the second test False-negative responses also decreased from a median of 2% to 0%. Sensitivity increased during the second test, particularly in peripheral locations. () Practice should be brief. A full additional threshold test may create fatigue and may alter the patient’s performance through learning. For most patients, a short demonstration or practice block is preferable to repeatedly performing a complete clinical test before the actual measurement. Combined Video and Verbal Instruction Video appears to work best when it reinforces, rather than replaces, a clear explanation from the technician. In a study of 90 patients, three instruction methods were compared: Verbal instruction alone Video instruction alone Video followed by verbal instruction The combined video-and-verbal approach resulted in the fewest repeat tests. Both video instruction and combined instruction produced more reliable fields than verbal instruction alone. () The technician should use a consistent script. Instructions that are too strict may cause patients to withhold responses; instructions that encourage excessive guessing may increase false-positive responses. The patient should follow the instructions for the specific instrument and testing algorithm being used. Quantified Effects on Reliability and Test Duration The available studies show a clearer improvement in reliability than in test duration. For the full table, please open this article on visualfieldtest.com. Important Limitations These percentages should not be combined as if they came from one large trial. The studies used different: Patient populations Visual field instruments Testing algorithms Definitions of a “reliable” test Instruction methods Study designs Some studies were randomized, while others were audits or before-and-after comparisons. Reliability indices such as fixation losses, false-positive responses, and false-negative responses are useful, but they should not be interpreted in isolation. Modern interpretation also considers the gaze trace, the pattern of loss, test duration, disease severity, and whether the result makes clinical sense. () A Practical Structured Coaching Protocol A clinic can provide structured coaching in approximately five to eight minutes. Step 1: Set Expectations Use simple language: > “This test measures how sensitive different parts of your vision are. You will not see every light. Missing some lights is normal.” This reduces the fear that a patient must respond perfectly. Step 2: Show the Procedure Use a video, tablet demonstration, or printed illustration to show: The central fixation target The surrounding flashes The response button The covered eye How the patient should sit How the technician monitors fixation Step 3: Demonstrate the Correct Response Tell the patient: Look steadily at the central target. Press only when a light is seen. Do not move the eyes toward the light. Blink normally. Do not try to predict when the next flash will appear. Ask for a pause if needed. The exact response instruction should match the instrument’s protocol. Step 4: Use Teach-Back Ask the patient to explain the procedure. Correct misunderstandings before testing begins. Step 5: Offer a Brief Practice A short non-diagnostic practice sequence can familiarize the patient with the button and the changing brightness of the lights. The practice result should not be used as the patient’s clinical baseline. Step 6: Use Neutral Support During Testing The technician should monitor the patient’s position, alertness, and fixation without repeatedly giving performance-related comments. Overly frequent prompts may distract the patient or alter responses. A standardized script and consistent technician approach are preferable because technician instructions can influence perimetry results. () In-Clinic Tutoring Versus Application-Based Home Modules What In-Clinic Tutoring Does Best In-clinic tutoring is strongest when: The patient is taking the test for the first time. TSupport the show