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=== Ophthalmology ===
Point spread functions have recently become a useful diagnostic tool in clinical [[ophthalmology]]. Patients are measured with a [[Shack–Hartmann wavefront sensor|Shack-Hartmann]] [[wavefront sensor]], and special software calculates the PSF for that patient's eye. This method allows a physician to simulate potential treatments on a patient, and estimate how those treatments would alter the patient's PSF. Additionally, once measured the PSF can be minimized using an adaptive optics system. This, in conjunction with a [[Charge-coupled device|CCD]] camera and an adaptive optics system, can be used to visualize anatomical structures not otherwise visible ''in vivo'', such as cone photoreceptors.<ref>{{Cite journal|last1=Roorda|first1=Austin|last2=Romero-Borja|first2=Fernando|last3=Iii|first3=William J. Donnelly|last4=Queener|first4=Hope|last5=Hebert|first5=Thomas J.|last6=Campbell|first6=Melanie C. W.|author6-link=Melanie Campbell|date=2002-05-06|title=Adaptive optics scanning laser ophthalmoscopy|journal=Optics Express|language=EN|volume=10|issue=9|pages=405–412|doi=10.1364/OE.10.000405|issn=1094-4087|bibcode=2002OExpr..10..405R|pmid=19436374|url=http://pdfs.semanticscholar.org/6c3e/66a6033bfbf4c7dafcd23f7a3c553ffa8b9b.pdf|archive-url=https://web.archive.org/web/20190225095146/http://pdfs.semanticscholar.org/6c3e/66a6033bfbf4c7dafcd23f7a3c553ffa8b9b.pdf|url-status=dead|archive-date=2019-02-25}}</ref>
==See also==
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