Roberto Sanchez

[Roberto Sanchez @Roberto49700138]

@UPFronterizos Buenos días, una consulta: los requerimientos sanitarios son los que figuran en la pagina https://t.co/Rt1kr36K6X? Otra consulta es el horario de cierre del lado chileno cuando ingreso desde Argentina, sería las 20? Desde ya muy agradecido.

[Roberto Sanchez @Roberto49700138]

@lagarto_cafe @IonsOpuma2020 @UntTuc thanks to you for the interest and for the questions

[Roberto Sanchez @Roberto49700138]

@lagarto_cafe @IonsOpuma2020 @UntTuc For the analysis of mirror surfaces I suppose other methods are used, such as analysis of deformation with respect to a perfectly flat surface

[Roberto Sanchez @Roberto49700138]

@lagarto_cafe @IonsOpuma2020 @UntTuc However, the advantage of adjusting a sigmoidal function, such as logistics for example, gives you the possibility of using different parameters of the curve

[Roberto Sanchez @Roberto49700138]

@lagarto_cafe @IonsOpuma2020 @UntTuc There is no doubt that stability can be evaluated by a correlation analysis. In subjects with no correlation there is no alteration of the tear, while in subjects with a positive correlation there is alteration.

[Roberto Sanchez @Roberto49700138]

@RIsabelY11 @IonsOpuma2020 @UntTuc Thank you for the interest and the question.

[Roberto Sanchez @Roberto49700138]

@juanathan4pi @IonsOpuma2020 @UntTuc Basically, the Fourier transform of the double-pass image is analyzed. In Fourier space we can filter spatial frequencies that contain scattering information and not information on aberrations

[Roberto Sanchez @Roberto49700138]

@juanathan4pi @IonsOpuma2020 @UntTuc Martínez-Roda JA, García-Guerra CE, Díaz-Doutón F, Pujol J, Salvador A & Vilaseca M (2019): Quantification of forward scattering based on the analysis of double-pass images in the frequency domain. Acta Ophthalmol. 97: e1019-e1026

[Roberto Sanchez @Roberto49700138]

@juanathan4pi @IonsOpuma2020 @UntTuc The FDSI follows the same idea of another parameter obtained with the double pass system. The following reference can be read:

[Roberto Sanchez @Roberto49700138]

@RIsabelY11 @IonsOpuma2020 @UntTuc Now that changed due to the type and amount of tincture used for diagnosis also changed. Now the cut is in approximately 5 seconds

[Roberto Sanchez @Roberto49700138]

@RIsabelY11 @IonsOpuma2020 @UntTuc The measurement is affected because not only the tear is being measured, but a mixture of tear and tincture. In fact, until a few years ago (plus or minus 10 years) the cutoff value for diagnosing dry eye disease was 10 seconds.