29-04-2021 дата публикации
Номер: US20210121323A1
Принадлежит:
A device for producing control data for a laser device for the surgical correction of defective vision. The device produces the control data such that the laser emits the laser radiation such that a volume in the cornea is isolated. The device calculates a radius of curvature R* to determine the control data, the cornea reduced by the volume having the radius of curvature R* and the radius of curvature being site-specific and satisfying the following equation: R*(r,φ)=1/((1/R(r,φ))+B(r,φ)/(n-1))+F, wherein R(r,φ) is the local radius of curvature of the cornea before the volume is removed, nis the refractive index of the material of the cornea, F is a coefficient, and B(r,φ) is the local change in refractive force required for the desired correction of defective vision in a plane lying in the vertex of the cornea, and at least two radii r1 and r2 satisfy the equation B(r=r1,φ)≠B(r=r2,φ). 134{'b': 2', '5', '3, 'the control data are adapted to control a laser (L) which cuts cornea tissue by irradiating laser radiation () into the cornea () of the eye (),'}{'b': 12', '2', '18', '5', '5, 'the device () generates the control data such that the laser (L), during operation according to the control data, emits the laser radiation () such that a volume () in the cornea () is isolated, the removal of which volume from the cornea () effects the desired correction of the defective vision and,'}{'b': 12', '5', '18, 'sub': 'CV', 'to determine the control data, the device () calculates a radius of curvature R* displayed by the cornea () reduced by the volume () characterized in that'}{'sub': 'CV', 'claim-text': {'br': None, 'i': R', 'V', 'r', 'R', 'r', 'B', 'r', 'n', 'F,, 'sub': C', 'CV', 'COR', 'c, '*(,φ)=1/((1/(,φ))+(,φ)/(-1))+'}, 'the radius of curvature R* is locally varying and satisfies the following equation{'sub': CV', 'c', 'COR, 'b': 5', '18', '5', '5, 'wherein R(r,φ) is the local radius of curvature of the cornea () before the volume () is removed, nis the refractive ...
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