Correction Method for Optical Scaling of Fundoscopy Images: Development, Validation, and First Implementation.

"a full mathematical description of the model the main elements of which are described below can be found in the appendix and the corresponding code is available at https://github com/mreye-lumc/paros ( fig 2 ).; screenshot of the user interface of paros which can be accessed via https://github com/mreye-lumc/paros where the full paros code can also be obtained.; however as the code for paros is publicly available at github ( https://github com/mreye-lumc/paros ) together with a table of known camera calibration constants such a modification is easily made."

"Disclosure: L.J. Pors, None; C. Haasjes, None; L. van Vught, None; N.P. Hoes, None; G.P.M. Luyten, None; G.A. van Rijn, None; T.H.K. Vu, None; C.R.N. Rasch, Varian a Siemens Healthineers Company (F), RaySearch Laboratories (F); N. Horeweg, Varian a Siemens Healthineers Company (F), RaySearch Laboratories (F); J.-W.M. Beenakker, Varian a Siemens Healthineers Company (F), RaySearch Laboratories (F), Philips Healthcare (F)"

"Supported in part by a grant from the Dutch Cancer Society (KWF, project number 13400)."