Phoria Measurement - Von Graefe method explanation
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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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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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Tuto N°2 - Les mesures des phories dissociées par la méthode des prismes de Von Graefe.👀
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Von Graefe's sign is the lagging of the upper eyelidon downward rotation of the eye, indicating exophthalmic goiter (Graves' Disease) It is a dynamic sign, whereas lid lag is a static sign which may also be present in cicatricial eyelid retraction or congenital ptosis..! #ophthalmology #vongraefesign #gravesdisease #exophthalmicgoiter #lidlag #ptosis #mbbs #help #mbbshelp | MBBS Help
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