US 12,298,601 B2
Myopia management soft contact lens design derive from analysis of overnight orthokeratology procedure
Richard I Tsung Wu, Taipei (TW); Wen-Pin Lin, Taipei (TW); and Lo-Yu Wu, Taipei (TW)
Assigned to BRIGHTEN OPTIX CORP., Taipei (TW)
Filed by Richard I Tsung Wu, Taipei (TW); and BRIGHTEN OPTIX CORP., Taipei (TW)
Filed on Feb. 1, 2022, as Appl. No. 17/590,398.
Prior Publication US 2023/0244089 A1, Aug. 3, 2023
Int. Cl. G02C 7/02 (2006.01); G02C 7/04 (2006.01)
CPC G02C 7/028 (2013.01) [G02C 7/047 (2013.01); G02C 2202/24 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for forming a myopia management soft contact lens design derived from analysis of an overnight orthokeratology procedure, comprising the steps of:
(A01) obtaining a corneal height data before and after corneal treatment according to a reference position of a cornea before and after corneal treatment by mathematical calculation, and then superimposing the corneal height data and the reference position of the cornea;
(A02) obtaining a size of a central optical zone and a size of a peripheral treatment zone of a corresponding effect by obtaining a difference of a corneal height change between before and after corneal treatment according to the corneal height data and tangential curvature data;
(A03) using an algorithm to calculate a corresponding power change through a position of the central optical zone, a position of the peripheral treatment zone and axial curvature data;
(A04) using an algorithm to calculate an average power curve of the cornea before and after corneal treatment;
(A05) dividing data of the cornea before and after treatment to distinguish different myopia power correction ranges to analyze corresponding different power profiles, and then applying the power profile to a front curved surface of a lens for manufacturing soft contact lenses; and
(A06) completing the design of contact lenses,
wherein in the above step (A02), the difference in the corneal height change before and after corneal treatment is that the height data of the cornea after the treatment is used to obtain the position of the corresponding complex point (x) formed in the central optical zone and the position of the complex point (y) formed in the peripheral treatment zone within 360 degrees, and use the Curve fit calculation method to obtain a better range of the central optical zone and the peripheral treatment zone, and the Curve fit method uses Least-square analysis:
error=Σ[(x−xc)2+(y−yc)2−R2], substitute the complex point (x) of the central optical zone and the complex point (y) of the peripheral treatment zone into the above formula of the Least-square analysis to solve for the XC, YC, and R value, where (XC, YC) is the position of the center point of the fitting circle, and the R is the radius value of the fitting circle.