Feather Symptom

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Parros Symptom Parrot-Schobert's sign is an unusual change in vision in one eye over a period of several days. This symptom is also called "binary eye phenomenon."

Symptoms This case was first reported in the medical journal Lancet in 1854. The patient noticed that his right eye began to appear double. At first he went to the doctor with complaints of double vision in his left eye, but then double vision was detected in his right eye. In the first days, both eyes were equal in visual acuity