Do focus measures apply to retinal images?

Yibin Tian, Kevin Shieh, Christine F. Wildsoet. Do focus measures apply to retinal images?. In Bernice E. Rogowitz, Thrasyvoulos N. Pappas, Scott J. Daly, editors, Human Vision and Electronic Imaging XII, San Jose, CA, USA, January 29 - February 1, 2007. Volume 6492 of SPIE Proceedings, SPIE, 2007. [doi]

@inproceedings{TianSW07-0,
  title = {Do focus measures apply to retinal images?},
  author = {Yibin Tian and Kevin Shieh and Christine F. Wildsoet},
  year = {2007},
  doi = {10.1117/12.705599},
  url = {http://dx.doi.org/10.1117/12.705599},
  researchr = {https://researchr.org/publication/TianSW07-0},
  cites = {0},
  citedby = {0},
  booktitle = {Human Vision and Electronic Imaging XII, San Jose, CA, USA, January 29 - February 1, 2007},
  editor = {Bernice E. Rogowitz and Thrasyvoulos N. Pappas and Scott J. Daly},
  volume = {6492},
  series = {SPIE Proceedings},
  publisher = {SPIE},
  isbn = {978-0-8194-6605-1},
}