@misc{indiciaef191031479c5,
  title = {Ray tracing through a schematic eye containing second-order (quadric) surfaces using 4 x 4 matrix notation.},
  author = {Achim Langenbucher and Arne Viestenz and Anja Viestenz and Holger Brünner and Berthold Seitz},
  year = {2006},
  doi = {10.1111/j.1475-1313.2006.00346.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/16460318/},
  note = {Source identifier: 16460318}
}