In order to determine whether accommodation occurs during general anesthesia, retinoscopy was performed on anesthetized patients before and after cycloplegia. Accommodation averaging 2.81 diopters was shown with cycloplegia by tropicamide and 1.89 D with cycloplegia by cyclopentolate hydrochloride. Patients not receiving a cycloplegic drug showed a partial loss of this accommodation during prolonged anesthesia.
Burch PG. Accommodation During General Anesthesia. Arch Ophthalmol. 1969;81(2):202–206. doi:10.1001/archopht.1969.00990010204010
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