Star testing: a novel evaluation of intraocular lens optical quality.

The British Journal of Ophthalmology
L MitchellG Sanderson

Abstract

Despite the importance of optical quality of an intraocular lens (IOL) on visual outcomes following cataract surgery, objective data on their optical quality are not readily available, and manufacturing standards are industry regulated. The star test is a classic test of optical quality based on examination of the Airy disc and expanded diffraction rings of a point source of light, used mainly for telescope and microscope objectives. A physical model eye cell allowed star testing of IOLs under conditions similar to the optical environment in which they operate. 18 IOLs were tested and results compared to actual images produced by these lenses in the model eye cell. Quantitative measures of star testing performance were developed. The optical performance of the IOLs varied, some performing very poorly. Most lenses (13/17) performed better in reverse orientation, while aberrations induced by the haptics of foldable IOLs were also detected. There was excellent correlation between actual images formed and star testing parameters. Star testing IOLs was a novel biomedical application of a centuries old, inexpensive method. A concerning variation of optical quality was found, suggesting IOL optical performance data should be more read...Continue Reading

References

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Citations

Dec 14, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Huanqing GuoChris Dainty
Jul 28, 2009·Journal of Cataract and Refractive Surgery·Meritxell VilasecaJosé L Güell
Sep 11, 2016·Journal français d'ophtalmologie·D Kaimbo Wa Kaimbo

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