The Asia-Pacific Journal of Ophthalmology

Asia-Pacific Journal of Ophthalmology:

Issue 1, January/February 2016 Review Article

Update on the Prevalence, Etiology, Diagnosis, and Monitoring of Normal-Tension Glaucoma

Kim, Ko Eun; Park, Ki-Ho



Author Information


From the Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea.


Reprints: Ki-Ho Park, MD, PhD, Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 110-744, Korea. E-mail: kihopark@snu.ac.kr.



Abstract


Glaucoma is a leading cause of blindness worldwide. Normal tension glaucoma (NTG) is a type of open-angle glaucoma with intraocular pressure measurements always 21 mm Hg or less. A controversy surrounding NTG is the question of whether it should be regarded as a disease within the spectrum of primary open-angle glaucoma or as a distinctive disease entity. Nonetheless, NTG does have distinctive features compared with primary open-angle glaucoma: intraocular pressure–independent risk factors for development of NTG, characteristic patterns of structural and functional damage, and a unique disease course. This review provides an overviewand update on the current issues surrounding the prevalence, etiology, diagnosis, and monitoring of NTG.




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