PMID: 2480626Jan 1, 1989Paper

Reproducibility of refraction and visual acuity measurement under a standard protocol. The Macular Photocoagulation Study Group.

Retina
D W Blackhurst, Maureen Maguire

Abstract

The authors present results of a study in which certified visual acuity examiners in the Macular Photocoagulation Study Group, performed independent replicate refractions and visual acuity measurements on both eyes of patients whose visual acuities ranged from 20/20 to less than 20/800. Patients with neovascular age-related macular degeneration (AMD), ocular histoplasmosis, or idiopathic neovascularization were represented. A total of 328 observations for 164 eyes from 82 patients were available for analysis. Overall reliabilities of the refraction data and the visual acuity data were 98.9% and 98.7%, respectively. Differences between replicate measurements were small; 87% were less than one line. However, differences were greater in patients with visual acuity less than 20/100 and in patients with AMD. These results indicate that the reliability of refraction and visual acuity measurements under a standard protocol is high and may depend on both visual acuity level and disease process. If a standard, systemic procedure is used for refraction and visual acuity testing, the clinician may be able to differentiate between true changes and measurement error, even among low vision patients with AMD.

Associated Clinical Trials

Citations

Jun 1, 1993·Annals of Neurology·A H CrossW M Hart
Mar 10, 2011·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Heinrich GerdingMelanie Timmermann
Sep 9, 2011·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Konrad R KochSascha Fauser
Aug 10, 2012·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Jae Hui KimHyo Shin Ha
Dec 5, 2002·Journal of Neuro-ophthalmology : the Official Journal of the North American Neuro-Ophthalmology Society·David R LynchLaura J Balcer
Dec 1, 2005·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Ava K KiserGislin Dagnelie
Mar 19, 2003·The British Journal of Ophthalmology·J B JonasR Degenring
Nov 26, 1994·BMJ : British Medical Journal·J C Pandit
Mar 11, 1995·BMJ : British Medical Journal·M J MoseleyP I Murray
Oct 26, 1996·BMJ : British Medical Journal·Y F Yang, M D Cole
Nov 29, 2012·Investigative Ophthalmology & Visual Science·Dawn K DeCarloCynthia Owsley
Jul 26, 2013·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Tariq AslamPaul N Bishop
Apr 15, 2014·American Journal of Ophthalmology·Benjamin J KimUNKNOWN CATT Research Group
Apr 1, 1995·Controlled Clinical Trials·J J GassmanW P Amoroso
Apr 26, 2005·Ophthalmic Epidemiology·Peggy R OrrUNKNOWN Submacular Surgery Trials Pilot Study Investigators
Mar 1, 1995·Journal of Cataract and Refractive Surgery·S C GrandonM Biscaro
Nov 14, 2008·Journal of Cataract and Refractive Surgery·Ruth Lapid-GortzakCarla P Nieuwendaal
Oct 3, 2007·Ophthalmology·Roy W BeckFrederick L Ferris
Sep 8, 2015·Geriatric Nursing·Carol EnderlinKerry Jordan
Aug 25, 2011·American Journal of Ophthalmology·Elizabeth A SugarUNKNOWN Multicenter Uveitis Steroid Treatment (MUST) Trial Research Group
Aug 26, 2014·Ophthalmology·Neil M BresslerUNKNOWN RIDE and RISE Research Groups
Jun 29, 2000·Multiple Sclerosis : Clinical and Laboratory Research·L J BalcerM G Maguire
Feb 21, 2018·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Ayeswarya RavikumarHeather A Anderson
Jan 25, 2019·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Asimina MataftsiAnna-Bettina Haidich
Dec 11, 2019·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Yi PangElyse Nylin

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
J E Lovie-Kitchin
Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
D B Elliott, M Sheridan
The New England Journal of Medicine
Philip J RosenfeldMARINA Study Group
The New England Journal of Medicine
David M BrownANCHOR Study Group
© 2022 Meta ULC. All rights reserved