Third-order theory of spectacle lenses applied to correction of peripheral refractive errors
Atchison, David A. (2011) Third-order theory of spectacle lenses applied to correction of peripheral refractive errors. Optometry and Vision Science, 88(2), pp. 227-233.
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Purpose: To demonstrate that relatively simple third-order theory can provide a framework which shows how peripheral refraction can be manipulated by altering the forms of spectacle lenses.
Method: Third-order equations were used to yield lens forms that correct peripheral power errors, either for the lenses alone or in combination with typical peripheral refractions of myopic eyes. These results were compared with those of finite ray-tracing.
Results: The approximate forms of spherical and conicoidal lenses provided by third-order theory were flatter over a moderate myopic range than the forms obtained by rigorous raytracing. Lenses designed to correct peripheral refractive errors produced large errors when used with foveal vision and a rotating eye. Correcting astigmatism tended to give large errors in mean oblique error and vice versa. When only spherical lens forms are used, correction of the relative hypermetropic peripheral refractions of myopic eyes which are observed experimentally, or the provision of relative myopic peripheral refractions in such eyes, seems impossible in the majority of cases.
Conclusion: The third-order spectacle lens design approach can readily be used to show trends in peripheral refraction.
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|Item Type:||Journal Article|
|Keywords:||myopia correction , peripheral refraction, third-order theory|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000)|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health|
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
|Copyright Owner:||Copyright 2011 American Academy of Optometry|
|Deposited On:||20 Mar 2012 10:56|
|Last Modified:||20 Mar 2012 10:57|
Available Versions of this Item
- Third-order theory and peripheral refraction. (deposited 19 Mar 2012 12:08)
- Third-order theory of spectacle lenses applied to correction of peripheral refractive errors. (deposited 20 Mar 2012 10:56)[Currently Displayed]
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