Anglia Ruskin Research Online (ARRO)
Browse
DOCUMENT
Allen_et_al_2003.pdf (40.02 kB)
DOCUMENT
Allen_et_al_2003_supp1.pdf (114.21 kB)
DOCUMENT
Allen_et_al_2003_supp2.pdf (13.82 kB)
1/0
3 files

Repeatability and validity of the PowerRefractor and the Nidek AR600-A in an adult population with healthy eyes

journal contribution
posted on 2023-08-30, 13:25 authored by Peter M. Allen, Hema Radhakrishnan, Daniel J. O'Leary
We assessed the repeatability and validity of the PowerRefractor and the Nidek AR-600A autorefractor. This is the first independent study conducted on adults to evaluate the performance of these instruments in a laboratory setting. Fifty subjects (23 males and 27 females) aged 16 to 61 years (mean, 37 ± 12) participated in the study. The validity of the PowerRefractor and the Nidek autorefractor readings were determined by comparing them to subjective refraction. Measurements of refractive error were obtained from the two instruments on two separate occasions to assess their repeatability. The measured refractive error was converted into a dioptric power matrix for data analysis. No significant difference was found between the measurements obtained with the two instruments and the subjective refraction. The estimate of refractive error given by the two instruments was also found to be repeatable. In addition to measuring the refractive error, the PowerRefractor also offers the facility to measure eye position, pupil size, and dynamics of accommodation. We suggest some improvements to the PowerRefractor measurement technique to standardize its clinical use and to improve accuracy.

History

Refereed

  • Yes

Volume

80

Issue number

3

Page range

245-251

Publication title

Optometry and Vision Science

ISSN

1538-9235

Publisher

American Academy of Optometry

File version

  • Accepted version

Language

  • eng

Legacy posted date

2010-07-29

Legacy creation date

2018-11-01

Legacy Faculty/School/Department

ARCHIVED Faculty of Science & Technology (until September 2018)

Usage metrics

    ARU Outputs

    Categories

    No categories selected

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC