Off-axis wave front measurements for optical correction in eccentric viewing
(2005) In Journal of Biomedical Optics 10(3).- Abstract
- In a previous study we have shown that correction of peripheral refractive errors can improve the remaining vision of subjects with large central visual field loss. Measuring peripheral refractive errors with traditional methods is often difficult due to low visual acuity and large aberrations. Therefore a Hartmann-Shack sensor has been designed to measure peripheral wave front aberrations in subjects using eccentric viewing. The sensor incorporates an eye tracker and analyzing software designed to handle large wave front aberrations and elliptic pupils. To ensure that the measurement axis is aligned with the direction of the subject's preferred retinal location, a special fixation target has been developed. It consists of concentric rings... (More)
- In a previous study we have shown that correction of peripheral refractive errors can improve the remaining vision of subjects with large central visual field loss. Measuring peripheral refractive errors with traditional methods is often difficult due to low visual acuity and large aberrations. Therefore a Hartmann-Shack sensor has been designed to measure peripheral wave front aberrations in subjects using eccentric viewing. The sensor incorporates an eye tracker and analyzing software designed to handle large wave front aberrations and elliptic pupils. To ensure that the measurement axis is aligned with the direction of the subject's preferred retinal location, a special fixation target has been developed. It consists of concentric rings surrounding the aperture of the sensor together with a central fixation mark along the measurement axis. Some initial measurements on subjects using eccentric viewing have been performed successfully. As a first step in improving the peripheral optics of the eye, the wave front has been used to calculate the eccentric refraction. This refraction has been compared to the refraction found with the Power-Refractor instrument. Measuring the off-axis wave front is a fast way to assess the optical errors in the subject's eccentric viewing angle and to better understand the problems of eccentric correction. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/209456
- author
- Lundström, Linda ; Unsbo, Peter and Gustafsson, Jörgen LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- eccentric refraction, PowerRefractor, central visual field loss, preferred, eccentric viewing, Strehl ratio, retinal location, Hartmann-Shack sensor, peripheral wave front aberrations, vision, Certec
- in
- Journal of Biomedical Optics
- volume
- 10
- issue
- 3
- publisher
- SPIE
- external identifiers
-
- wos:000235127400022
- pmid:16229646
- scopus:27744563913
- ISSN
- 1083-3668
- DOI
- 10.1117/1.1920587
- language
- English
- LU publication?
- yes
- id
- 2495cd96-795d-4931-9fc2-0cf19fda5607 (old id 209456)
- alternative location
- http://spiedl.aip.org/getabs/servlet/getabsservlet?prog=normal&id=jbopfo000010000003034002000001&idtype=cvips&gifs=yes
- date added to LUP
- 2016-04-01 12:21:03
- date last changed
- 2022-01-27 02:29:27
@article{2495cd96-795d-4931-9fc2-0cf19fda5607,
abstract = {{In a previous study we have shown that correction of peripheral refractive errors can improve the remaining vision of subjects with large central visual field loss. Measuring peripheral refractive errors with traditional methods is often difficult due to low visual acuity and large aberrations. Therefore a Hartmann-Shack sensor has been designed to measure peripheral wave front aberrations in subjects using eccentric viewing. The sensor incorporates an eye tracker and analyzing software designed to handle large wave front aberrations and elliptic pupils. To ensure that the measurement axis is aligned with the direction of the subject's preferred retinal location, a special fixation target has been developed. It consists of concentric rings surrounding the aperture of the sensor together with a central fixation mark along the measurement axis. Some initial measurements on subjects using eccentric viewing have been performed successfully. As a first step in improving the peripheral optics of the eye, the wave front has been used to calculate the eccentric refraction. This refraction has been compared to the refraction found with the Power-Refractor instrument. Measuring the off-axis wave front is a fast way to assess the optical errors in the subject's eccentric viewing angle and to better understand the problems of eccentric correction.}},
author = {{Lundström, Linda and Unsbo, Peter and Gustafsson, Jörgen}},
issn = {{1083-3668}},
keywords = {{eccentric refraction; PowerRefractor; central visual field loss; preferred; eccentric viewing; Strehl ratio; retinal location; Hartmann-Shack sensor; peripheral wave front aberrations; vision; Certec}},
language = {{eng}},
number = {{3}},
publisher = {{SPIE}},
series = {{Journal of Biomedical Optics}},
title = {{Off-axis wave front measurements for optical correction in eccentric viewing}},
url = {{http://dx.doi.org/10.1117/1.1920587}},
doi = {{10.1117/1.1920587}},
volume = {{10}},
year = {{2005}},
}