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CRITICAL FLICKER FREQUENCY (CFF) IN MAN DURING INDUCED OCULAR HYPERTENSION
Author(s) -
BERGGREN LENNART
Publication year - 1973
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1973.tb06036.x
Subject(s) - medicine , ophthalmology , pupil , flicker fusion threshold , blood pressure , optometry , ocular hypertension , intraocular pressure , astigmatism , flicker , psychology , computer science , optics , physics , neuroscience , operating system
Using a new technique, twelve subjects with healthy eyes, 24–44 years of age were studied by CFF and IOP determinations during acute intraocular pressure rises induced by dynamometry. An abrupt significant decrease in CFF was noted above 40 mmHg. There was no evidence that the CFF level during dynamometry was affected by changes in pupil size, astigmatism or refractive error. It is suggested that the cause of the decrease in CFF may be due to vascular changes in parts of the choroidal circulation. The apparatus has been designed in order to make future clinical use possible. When used for testing normal subjects, the apparatus has been shown to be easy to handle and requires only reasonable cooperation from the test subject. The investigation takes only a few minutes.