Off-axis measurements of a plano distance power progressive addition lens
To test that the Humphrey Lens Analyzer can be used validly to measure off-axis powers of progressive addition lenses of low distance power, we made measurements of a plano distance progressive power lens with both a conventional focimeter and the Humphrey Lens Analyzer. The use of the Humphrey Lens Analyzer in two modes, one in which the lens rotated about its back surface centre of curvature (mode 2), gave off-axis power measurements which were similar to those of conventional measurements. In addition, the Humphrey Lens Analyzer in mode 1 gave prism measurements which were similar to conventional measurements. The Humphrey Lens Analyzer in mode 2 gave prism measurements which were less than those of conventional measurements, but the prism contours were similar and the differences were <1 Δ within 20 mm of the lens centre.
Impact and interest:
Citation counts are sourced monthly from and citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see link) or contact the author. Author contact details: firstname.lastname@example.org|
|Keywords:||progressive addition lens, off, axis power, Humphrey Lens Analyzer|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 1993 Blackwell Publishing|
|Copyright Statement:||The definitive version is available at www.blackwell-synergy.com|
|Deposited On:||28 Sep 2006|
|Last Modified:||15 Jan 2009 07:12|
Repository Staff Only: item control page