Abstract |
Spectacle lens materials of high refractive index (nd) tend to have high chromatic dispersion (low Abbé number [V]), which may contribute to visual blurring with oblique viewing. A patient who noted off-axis blurring with new high-refractive-index spectacle lenses prompted us to do a photographic simulation of the off-axis aberrations in 3 readily available spectacle lens materials, CR-39 (nd = 1.50), polyurethane (nd = 1.60), and polycarbonate (nd = 1.59). Both chromatic and monochromatic aberrations were found to cause off-axis image degradation. Chromatic aberration was more prominent in the higher-index materials (especially polycarbonate), whereas the lower-index CR-39 had more astigmatism of oblique incidence. It is important to consider off-axis aberrations when a patient complains of otherwise unexplained blurred vision with a new pair of spectacle lenses, especially given the increasing promotion of high-refractive-index materials with high chromatic dispersion.
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Authors | Pavle Doroslovački, David L Guyton |
Journal | Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus
(J AAPOS)
Vol. 19
Issue 1
Pg. 91-3
(Feb 2015)
ISSN: 1528-3933 [Electronic] United States |
PMID | 25727601
(Publication Type: Journal Article)
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Copyright | Copyright © 2015 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved. |
Topics |
- Eyeglasses
(adverse effects)
- Humans
- Middle Aged
- Myopia
(therapy)
- Optics and Photonics
- Photography
(methods)
- Prosthesis Failure
- Refractometry
- Vision Disorders
(diagnosis, etiology)
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