@article {1213816,
	title = {High Altitude-associated Changes in Intraocular Pressure Abrogated by Trabeculectomy},
	journal = {J Glaucoma},
	volume = {26},
	number = {10},
	year = {2017},
	month = {2017 Oct},
	pages = {957-960},
	abstract = {PURPOSE: To highlight the effect of ascent to high altitude on intraocular pressure (IOP) in a patient with primary open-angle glaucoma, who had previously undergone trabeculectomy in 1 eye. METHODS: Case report. RESULTS: A 66-year-old mountaineer with primary open-angle glaucoma and previous right trabeculectomy performed self-tonometry using a rebound tonometer (Icare HOME) before and during an expedition in the Himalaya. In the nonoperated eye, there was a statistically significant increase in IOP as the patient ascended to 5000 m over 8 days (R=0.790, P=0.001), consistent with recent literature. IOP increased by 1.73 mm Hg with each 1000 m increase in altitude. In the trabeculectomized eye there was no significant increase in IOP (R=0.219, P=0.172). CONCLUSIONS: Filtration surgery may be protective against IOP fluctuations associated with ascent to high altitude. Self-tonometry complements standard glaucoma care by providing opportunities for IOP monitoring outside office hours and in remote locations.},
	issn = {1536-481X},
	doi = {10.1097/IJG.0000000000000713},
	author = {Foulsham, William and Tatham, Andrew J}
}
