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Fernando Fernando Gomez Goyeneche, Patricia Hernandez; PERSISTENCE OF APPOSITIONAL ANGLE CLOSURE AFTER LASER PERIPHERAL IRIDOTOMY IN HISPANIC PRIMARY ANGLE CLOSURE SUSPECTS. Invest. Ophthalmol. Vis. Sci. 2017;58(8):4978.
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© ARVO (1962-2015); The Authors (2016-present)
Determine the frequency of persitence of appositional angle closure (PAAC) after a laser peripheral iridotomy (LPI) in Hispanic primary angle closure suspects. To ascertain the mechanism of angle closure by ultrabiomicroscopy.
Cross sectional observational study. One hundred and seventy (170) patients, corresponding to 333 eyes with LPI were included to evaluate the efficacy on the elimination of the appositional angle closure. Indentation gonioscopy was performed and a Ultrasound biomicroscopy was performed in all cases of when laser iridotomy either fails to open the angle or opens it only partially in order to know the mechanism of angle closure.
Laser iridotomy relieved the iris convexity, the iris assumed a flat or planar configuration and the iridocorneal angle widened in 76 % of the cases. Persistence of appositional closure ≥ 2 quadrants was seenin 24 % of the eyes of hispanic origen, 88% of the cases were women.Iris plateau configuration was found in 18% of the cases using ultrasound biomicroscopy.
Persistence of appositional angle closure after LPI was present in one-fourth of primary angle closure suspects among this hispanic population. Indentation gonioscopy is necessary after LPI to evaluate if the appositional angle closure has been eliminated in order to prevent acute angle closure episodes. Pupillary block is the most common cause of occludable angles follow by plateau iris. Ultrasound biomicroscopy shall be taken into account as a diagnostic tool to evaluate the angle closure machanism. Further research is needed to determine racial/ethnic variations in response to iridotomy.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
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