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. 2016 Nov 9;10:2245–2249. doi: 10.2147/OPTH.S117971

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© 2016 Moshirfar et al. This work is published and licensed by Dove Medical Press Limited

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Mathematical method for calculating the theoretical slit spacing to be compared to the programmed spot/line spacing on the femtolaser laser outlined by Krueger et al.²

Notes: A point of light source is pushed through a piece of white paper which is held at arms’ length. The patient can draw the spectrum they see on the piece of paper and the corresponding angle, θ_m, can be calculated. Knowing the angle, it is easy to calculate the theoretical spot spacing using the diffraction grating equation.