VON GRAEFE TEST: The Von Graefe phoria test is a common clinical method to measure heterophoria (a latent eye turn) by using prisms to dissociate the eyes and have the patient align two separate images. HOW IT WORKS: Setup: The patient looks at a fixation target through a phoropter or trial frame at a specific distance (e.g., 6 meters for distance, 40 cm for near). Prism placement: A vertical prism (like a 12Δ base-up) is placed before one eye to vertically separate the images. A horizontal pris
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Vivid Visions Optometry, Inc on Instagram: "Vertical heterophoria means your eyes are slightly misaligned vertically, making it harder for your brain to fuse images into one. This can cause headaches, dizziness, eye strain, balance issues, and motion sensitivity. Using eccentric circles in therapy helps retrain the brain to fuse images correctly while strengthening control over eye alignment. While keeping the circles fused, slowly move one card up and the other card down, trying hard not to bre
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