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Visual Acuity
Research News and Information
Definition of 'Visual Acuity'Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast. |
Sunday, November 08, 2009
Long-term outcomes of repeat vs initial trabeculectomy in open-angle glaucoma.
30 Oct 2009 
PURPOSE: To evaluate the long-term intraocular pressure (IOP) control and to identify risk factors for failure of repeat trabeculectomy with mitomycin C (MMC) in patients with open-angle glaucoma. DESIGN: Retrospective case-control study. METHODS: ... Read more...
The cost of care for people with impaired vision in Australia.
29 Sep 2009 OBJECTIVE: To prospectively collect data on the providers, types, and costs of care for people with impaired vision in Australia. METHODS: Adults with impaired vision, visual acuity worse than 20/40, were recruited from clinics, vision ... Read more...
Prevalence and causes of visual impairment in Chinese adults in urban southern China.
29 Sep 2009 OBJECTIVE: To assess the prevalence and causes of visual impairment and blindness in adults living in an urban area of southern China. METHODS: Random cluster sampling was used to identify the adults 50 years and older living in the Liwan district ... Read more...
Latest indexed articles for 'Visual Acuity'
These are the very latest articles for this heading:
- Long-term outcomes of repeat vs initial trabeculectomy in open-angle glaucoma. 30 Oct 2009
- Intravitreal ranibizumab as primary treatment for neovascular membrane associated with idiopathic juxtafoveal retinal telangiectasia.
30 Oct 2009 - Clinical and tomographic features of macular punctate outer retinal toxoplasmosis. 29 Sep 2009
- Progressive optic disc change: implications for clinical practice and trial design. 29 Sep 2009
- The cost of care for people with impaired vision in Australia. 29 Sep 2009
- Prevalence and causes of visual impairment in Chinese adults in urban southern China. 29 Sep 2009
- Features and function of multiple evanescent white dot syndrome. 29 Sep 2009
- Pars plana vitrectomy alone with diffuse illumination and vitreous dissection to manage primary retinal detachment with unseen breaks. 29 Sep 2009
- Contributions of the capsulorrhexis to straylight. 29 Sep 2009
- Endothelial cell loss and surgically induced astigmatism after sutureless large-incision manual cataract extraction (SLIMCE). 29 Sep 2009
- Intraoperative and postoperative effects of corneal collagen cross-linking on progressive keratoconus. 29 Sep 2009
- Prediction of functional loss in glaucoma from progressive optic disc damage. 29 Sep 2009
- Cataract surgery in infant eyes with microphthalmos. 29 Sep 2009
- Consultation section. Cataract surgical problem. 29 Sep 2009
- Toric intraocular lens versus opposite clear corneal incisions to correct astigmatism in eyes having cataract surgery. 29 Sep 2009
- Overcorrection after femtosecond-assisted astigmatic keratotomy in a post-Descemet-stripping automated endothelial keratoplasty patient. 29 Sep 2009
- Straylight measurements before and after removal of epithelial ingrowth. 29 Sep 2009
- Culture-positive endophthalmitis after implantation of intraocular Collamer lens. 29 Sep 2009
- Primary anterior chamber intraocular lens for the treatment of severe crystalline lens subluxation. 29 Sep 2009
- Excimer laser correction of moderate to high astigmatism with a non-wavefront-guided aberration-free ablation profile: Six-month results. 29 Sep 2009
See a longer list of these articles.
Technical information about 'Visual Acuity'
Definition: Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.
Descriptor UI: D014792
Alternative terms: Visual Acuity; Acuities, Visual; Acuity, Visual; Visual Acuities;
Related Mesh Headings: Refraction, Ocular; Refractive Errors;
Allowable Qualifiers: drug effects; genetics; immunology; physiology; radiation effects;
Tree Number: E01.370.380.850.950; F02.463.593.932.901; G14.940;
History Note: 70(68)