Creating correct aberrations: why blur isn’t always bad in the eye

In optics in general, a sharp aberration-free image is normally the desired goal, and the whole field of adaptive optics has developed with the aim of producing blur-free images. Likewise, in ophthalmic optics we normally aim for a sharp image on the retina. But even with an emmetropic, or well-corrected eye, chromatic and high order aberrations affect the image. We describe two different areas where it is important to take these effects into account and why creating blur correctly via rendering can be advantageous. Firstly we show how rendering chromatic aberration correctly can drive accommodation in the eye and secondly report on matching defocus-l generated using rendering with conventional optical defocus.

[1]  T. Candy,et al.  Longitudinal chromatic aberration of the human infant eye. , 2008, Journal of the Optical Society of America. A, Optics, image science, and vision.

[2]  A. Bradley,et al.  The longitudinal chromatic aberration of the human eye, and its correction , 1986, Vision Research.

[3]  G. Wyszecki,et al.  Axial chromatic aberration of the human eye. , 1957, Journal of the Optical Society of America.

[4]  M. Bach,et al.  Subjective visual acuity with simulated defocus , 2011, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[5]  W K Adrian,et al.  Influence of Age on Chromatic Aberration of the Human Eye , 1985, American journal of optometry and physiological optics.

[6]  G Smith,et al.  Effect of Defocus on Visual Acuity As Measured by Source and Observer Methods , 1989, Optometry and vision science : official publication of the American Academy of Optometry.

[7]  G. Wald,et al.  The change in refractive power of the human eye in dim and bright light. , 1947, Journal of the Optical Society of America.

[8]  A L Lewis,et al.  A modified achromatizing lens. , 1982, American journal of optometry and physiological optics.

[9]  P. Artal,et al.  Ocular aberrations as a function of wavelength in the near infrared measured with a femtosecond laser. , 2005, Optics express.

[10]  G Smith,et al.  Effect of Defocus on Blur Thresholds and on Thresholds of Perceived Change in Blur: Comparison of Source and Observer Methods , 1989, Optometry and vision science : official publication of the American Academy of Optometry.

[11]  Gordon D. Love,et al.  Chromablur , 2017, ACM Trans. Graph..

[12]  Arne Ohlendorf,et al.  Visual Acuity with Simulated and Real Astigmatic Defocus , 2011, Optometry and vision science : official publication of the American Academy of Optometry.

[13]  Toshifumi Mihashi,et al.  Verification of the lack of correlation between age and longitudinal chromatic aberrations of the human eye from the visible to the infrared. , 2015, Biomedical optics express.

[14]  Michel Millodot,et al.  The influence of age on the chromatic aberration of the eye , 1976, Albrecht von Graefes Archiv für klinische und experimentelle Ophthalmologie.

[15]  Human axial chromatic aberration found not to decline with age , 2005, Graefe's Archive for Clinical and Experimental Ophthalmology.

[16]  A. Bradley,et al.  The chromatic eye: a new reduced-eye model of ocular chromatic aberration in humans. , 1992, Applied optics.

[18]  P. L. Pease,et al.  Longitudinal Chromatic Aberration of the Human Eye and Wavelength in Focus , 1988, American journal of optometry and physiological optics.

[19]  B. Wandell,et al.  Matching color images: the effects of axial chromatic aberration , 1994 .

[20]  W. Charman,et al.  Objective measurements of the longitudinal chromatic aberration of the human eye , 1976, Vision Research.

[21]  Gordon D. Love,et al.  Creating correct blur and its effect on accommodation , 2018, Journal of vision.

[22]  A Bradley,et al.  Does the chromatic aberration of the eye vary with age? , 1988, Journal of the Optical Society of America. A, Optics and image science.

[23]  Susana Marcos,et al.  Experimental Test of Simulated Retinal Images Using Adaptive Optics , 2009 .

[24]  I. Powell,et al.  Lenses for correcting chromatic aberration of the eye. , 1981, Applied optics.