43. NORMAL EYE WITH GLAUCOMA SHOWING NFL THINNING
Thick RNFL coded yellow, orange, red Thin RNFL coded blue and green
Based on the assumption that RNFL is birefringent ( due to parallel microtubules), polarized diode
laser light(780nm) is used that penetrates tissue
Editor's Notes
Notching : localized defect of nrr in cup side ; bayonetting: as the cup enlarges vessels are bent along the sharp edge of the cup
Other vascular signs
Emitted beam is directed in the x-axis and y axis along a plane of focus perpendicular to the optic axis using 2 oscillating mirror to obtain a 15x15 degree 2D image reflected fro the surface of retina and optic disc coming out to the sensor through a small pinhole aperture
Birefringent is the property of media that scatters lights rays in various axis d/t changes in refreactive index.so polarized light used..where rays travels in single wavefont