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 offaxis 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.
Original language | English (US) |
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Pages (from-to) | 91-93 |
Number of pages | 3 |
Journal | Journal of AAPOS |
Volume | 19 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2015 |
ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health
- Ophthalmology