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Ocular Aberrations in the Peripheral Visual Field With a Commercial Open-View Aberrometer
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- Baskaran, Karthikeyan (författare)
- Linnéuniversitetet,Institutionen för naturvetenskap, NV,Vision Enabling Lab
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- Theagarayan, Baskar (författare)
- Linnéuniversitetet,Institutionen för naturvetenskap, NV
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- Carius, Staffan (författare)
- Linnéuniversitetet,Institutionen för datavetenskap, fysik och matematik, DFM
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- (creator_code:org_t)
- 2010
- 2010
- Engelska.
- Ingår i: Investigative Ophthalmology and Visual Science. - 0146-0404 .- 1552-5783. ; 51:5
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Oftalmologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Ophthalmology (hsv//eng)
Nyckelord
- aberrations
- visual fields
- Optometry
- Optometri
- Optometry
- Optometri
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Investigative Ophthalmology and Visual Science (Sök värdpublikationen i LIBRIS)
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