Normal-tension glaucoma (Low-tension glaucoma).
Indian J Ophthalmol
;
2011 Jan; 59 (Suppl1): 97-101
Article
in English
| IMSEAR
| ID: sea-136259
ABSTRACT
Glaucoma is now considered an abnormal physiology in the optic nerve head that interacts with the level of intraocular pressure (IOP), with the degree and rate of damage depending on the IOP and presumably the degree of abnormal physiology. Diagnosis of normal-tension glaucoma (NTG), defined as glaucoma without a clearly abnormal IOP, depends on recognizing symptoms and signs associated with optic nerve vulnerability, in addition to absence of other explanations for disc abnormality and visual field loss. Among the findings are a halo or crescent of absence of retinal pigment epithelium around the disc, bilateral pre-chiasmal visual field defects, splinter hemorrhages at the disc margin, vascular dysregulation (low blood pressure, cold hands and feet, migraine headache with aura, and the like), or a family history of glaucoma. Possibly relevant, is a history of hemodynamic crisis, arterial obstructive disease, or sleep apnea. Neurological evaluation with imaging is needed only for atypical cases or ones that progress unexpectedly. Management follows the same principle of other chronic glaucomas, to lower the IOP by a substantial amount, enough to prevent disabling visual loss. However, many NTG cases are non-progressive. Therefore, it may often be wisein mild cases to determine whether the case is progressive and the rate of progression before deciding on how aggressivene to be with therapy. Efforts at neuroprotection and improvement in blood flow have not yet been shown effective.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Ophthalmoscopy
/
Optic Disk
/
Vision Disorders
/
Humans
/
Visual Fields
/
Medical Records
/
Disease Progression
/
Diagnosis, Differential
/
Diagnostic Techniques, Ophthalmological
/
Low Tension Glaucoma
Type of study:
Diagnostic study
Language:
English
Journal:
Indian J Ophthalmol
Year:
2011
Type:
Article
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