alexa Effect of small focal errors on vision.


Optometry: Open Access

Author(s): Miller AD, Kris MJ, Griffiths AC, Miller AD, Kris MJ, Griffiths AC

Abstract Share this page

Abstract PURPOSE: The aim of this study was to quantify the effects of small plus focal errors on the quality of vision of wearers who habitually wear either no correction, or a low powered, distance only correction. METHODS: Patients wore spectacles with small errors deliberately included for a 2-day trial wear period; a short subjective questionnaire, and some laboratory measures of visual function were also used to assess the effects of these focus errors. RESULTS: A significant number of wearers notice, and are dissatisfied with, focal errors in distance vision as small as +0.25 D, in both sphere and cylinder. CONCLUSION: This finding supports clinical practice in refining the refraction to the nearest 0.25 D. It suggests that for critical applications and for critical patients, the practice of slightly undercorrecting hypermetropes should be applied, so that patients can use a little of their own accommodation for optimal distance vision.
This article was published in Optom Vis Sci and referenced in Optometry: Open Access

Relevant Expert PPTs

Relevant Speaker PPTs

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

1-702-714-7001Extn: 9037

Business & Management Journals


1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

1-702-714-7001 Extn: 9042

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version