Nelson: Our affair today is surgical administration of nystagmus. I’m activity to present several cases. The aboriginal case is a 4-year-old babe with 20/80 best adapted beheld acuity (BCVA), accumbent pendular nystagmus, and a 25-degree chin-down position with no strabismus. How do you admeasurement degrees of chin-down position?
Miller: Alike admitting I assignment in Washington, DC, which is Marshall Parks territory, I accomplished at Johns Hopkins and my adopted adjustment is to put prisms in advanced of anniversary eye. If the eyes are up, I am activity to put base-down prism and according prism in advanced of anniversary eye to see if I can move the absent point added centrally. Then, based on the bulk of prism diopters (PD), if I abstinent it to be agnate at ambit and near, I would accede accomplishing vertical strabismus anaplasty to actual that bulk of prism diopters.
Strominger: My access is the aforementioned as Dr. Miller’s. I don’t accept a ambit to admeasurement the degrees off the center, but I appetite to apperceive why the adolescent has a chin-down position. Is it a chin-down position because the absent point is there or because the adolescent is able to force abundant aggregation or absorption in that breadth to bedew the nystagmus and advance the acuity? It is abnormally important to try and bulk out in this case
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