Refraction and aberration across the horizontal central 10 degrees of the visual field
Atchison, David A., Lucas, Stephen D., Ashman, Ross, Huynh, Michael A., Shilt, David W., & Ngo, Phuc Q. (2006) Refraction and aberration across the horizontal central 10 degrees of the visual field. Optometry and Vision Science, 83(4), pp. 213-221.
Purpose. The purpose of this study was to measure refraction and aberrations across the horizontal central visual field.
Methods. Cycloplegic refraction was measured on eight subjects at 13 points across the horizontal central 10[degrees] of the retina using a Hartmann-Shack wavefront sensor. Refractions were converted into mean sphere (M), 90[degrees] to 180[degrees] astigmatism (J180), and 45[degrees] to 135[degrees] astigmatism (J45) components. For five subjects, higher-order aberrations were determined at the center and edges of the field.
Results. Subtle changes in refraction were found to exist across the central 10[degrees] of the retina, with changes in mean best sphere varying by up to half a diopter across this region and with smaller changes in astigmatism. Horizontal coma, but no other higher-order aberrations, varied systemically across the visual field; it varied linearly with angle but at different rates for the different subjects.
Conclusion. Subtle changes in cycloplegic refraction exist across the horizontal central 10[degrees] of the retina. The results indicate the need for correct alignment when measuring objective refraction.
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|Item Type:||Journal Article|
|Additional Information:||The contents of this journal can be freely accessed online via the journal’s web page (see link) 12 months after publication. For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: firstname.lastname@example.org|
|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 2006 Lippincott Williams & Wilkins|
|Deposited On:||14 Nov 2006 00:00|
|Last Modified:||29 Feb 2012 13:23|
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