Ocular hypertension: Difference between revisions
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'''Ocular hypertension''' (OHT) is [[intraocular pressure]] higher than normal in the absence of [[optic nerve]] damage or [[visual field]] loss.<ref>[http://www.aao.org/aao/patients/eyemd/upload/Ocular-Hypertension-Glaucoma-and-Eye-Drops.pdf American Academy of Ophthalmology]</ref><ref>[http://www.aoa.org/x1799.xml American Optometric Association]</ref> | '''Ocular hypertension''' (OHT) is [[intraocular pressure]] higher than normal in the absence of [[optic nerve]] damage or [[visual field]] loss.<ref>[http://www.aao.org/aao/patients/eyemd/upload/Ocular-Hypertension-Glaucoma-and-Eye-Drops.pdf American Academy of Ophthalmology]</ref><ref>[http://www.aoa.org/x1799.xml American Optometric Association]</ref> | ||
Current consensus in [[ophthalmology]] defines normal introcular pressure (IOP) as that between 10 mmHg and 21 mmHg. | Current consensus in [[ophthalmology]] defines normal introcular pressure (IOP) as that between 10 mmHg and 21 mmHg. Elevated IOP is the most important risk factor for [[glaucoma]], so those with ocular hypertension are frequently considered to have a greater chance of developing the condition. | ||
Intraocular pressure can increase when a patient lies down. There is evidence that some glaucoma patients (e.g., normal tension glaucoma patients) with normal IOP while sitting or standing may have intraocular pressure that is elevated enough to cause problems when they are lying down. | Intraocular pressure can increase when a patient lies down. There is evidence that some glaucoma patients (e.g., normal tension glaucoma patients) with normal IOP while sitting or standing may have intraocular pressure that is elevated enough to cause problems when they are lying down. | ||
==Treatment== | ==Treatment== | ||
Revision as of 05:53, 23 August 2012
| Ocular hypertension | |
| ICD-10 | H40.0 |
|---|---|
| ICD-9 | 365.04 |
| DiseasesDB | 5226 |
| MeSH | D009798 |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Ocular hypertension (OHT) is intraocular pressure higher than normal in the absence of optic nerve damage or visual field loss.[1][2]
Current consensus in ophthalmology defines normal introcular pressure (IOP) as that between 10 mmHg and 21 mmHg. Elevated IOP is the most important risk factor for glaucoma, so those with ocular hypertension are frequently considered to have a greater chance of developing the condition.
Intraocular pressure can increase when a patient lies down. There is evidence that some glaucoma patients (e.g., normal tension glaucoma patients) with normal IOP while sitting or standing may have intraocular pressure that is elevated enough to cause problems when they are lying down.
Treatment
Medication
Ocular hypertension are mostly treated with pilocarpine, timolol, acetazolamide and clonidine[3]. There are also other, less commonly used, alternatives. Eye drops may initially be started either in one or in both eyes.[4]
| Medication | Mechanism | Dosage form[5] | Adverse effects[5] |
|---|---|---|---|
| pilocarpine | muscarinic agonist | eye drops | |
| timolol | β-receptor antagonist | ||
| acetazolamide | carbonic anhydrase inhibitor | systemic administration |
|
| clonidine | α2-receptor agonist | eye drops | |
| ecothiopate | cholinesterase inhibitor | eye drops | |
| carteolol | β-receptor antagonist | eye drops | |
| dorzolamide | carbonic anhydrase inhibitor | eye drops |
|
| apraclonidine | α-2 agonist | eye drops | |
| latanoprost | prostaglandin analogue |
References
- ↑ American Academy of Ophthalmology
- ↑ American Optometric Association
- ↑ Rang, H. P. (2003). Pharmacology. Edinburgh: Churchill Livingstone. ISBN 0-443-07145-4. Page 146
- ↑ [ http://www.biomedcentral.com/1471-2415/7/17 Interpretation of uniocular and binocular trials of glaucoma medications]
- ↑ 5.0 5.1 Unless else specified in boxes, then ref is: Rang, H. P. (2003). Pharmacology. Edinburgh: Churchill Livingstone. ISBN 0-443-07145-4. Page 146