Search: L773:0146 0404 OR L773:1552 5783 >
Ocular Aberrations ...
Ocular Aberrations in the Peripheral Visual Field With a Commercial Open-View Aberrometer
-
- Baskaran, Karthikeyan (author)
- Linnéuniversitetet,Institutionen för naturvetenskap, NV,Vision Enabling Lab
-
- Theagarayan, Baskar (author)
- Linnéuniversitetet,Institutionen för naturvetenskap, NV
-
- Carius, Staffan (author)
- Linnéuniversitetet,Institutionen för datavetenskap, fysik och matematik, DFM
-
show more...
-
- Gustafsson, Jörgen (author)
- Linnéuniversitetet,Institutionen för naturvetenskap, NV
-
show less...
-
(creator_code:org_t)
- 2010
- 2010
- English.
-
In: Investigative Ophthalmology and Visual Science. - 0146-0404 .- 1552-5783. ; 51:5
- Related links:
-
http://abstracts.iov...
-
show more...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- PurposeThe interest in off-axis aberrations has increased with the discovery of a possible link between myopia development and peripheral optics. The most common technology to measure the off-axis aberrations is a Shack-Hartmann wavefront aberrometer. This is the first study to report peripheral aberrations in a large sample of emmetropic population with a commercial open-view Shack-Hartmann aberrometer. MethodsThe commercial open-view Shack-Hartmann aberrometer COAS-HD VR was used to measure the aberrations in the peripheral vision. Aberrations of the right eye of 30 emmetropes (24 {+/-} 4 years) were studied. Off-axis aberrations were measured in steps of 10{degrees} out to {+/-} 30{degrees} in the horizontal visual field. The subjects turned their eye to view the off-axis fixation target (light emitting diode placed at 3 meters) during the measurement. The resulting wavefront aberrations were parameterized with Zernike coefficients for a 5 mm diameter pupil. All analyzes are reported according to optical society of America (OSA) recommended standards. ResultsAberrations from the 2nd to 6th order and the total higher-order root-mean-square (HO RMS) were analyzed using one-way ANOVA. The defocus C02 was significantly myopic in the nasal visual field (+20{degrees}, +30{degrees}) whereas there was no significant difference in the temporal visual field. Astigmatism C22 increased quadratically from {+/-}10{degrees} in the periphery and coma C13 showed a linear increase across the horizontal visual field (p < 0.05). The spherical aberration C04 and the total HO RMS showed a significant change at {+/-}30o. ConclusionsOur results showed that in young emmetropes there was a significant increase of HO RMS at {+/-}30{degrees}, which is expected. Astigmatism, horizontal coma, and spherical aberration vary systematically across the horizontal visual field in agreement with Seidel theory. The findings of our study with a large sample of emmetropic population agree with the previous studies done with laboratory built aberrometers.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Oftalmologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Ophthalmology (hsv//eng)
Keyword
- aberrations
- visual fields
- Optometry
- Optometri
- Optometry
- Optometri
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database