US 12,379,610 B2
Orthokeratology lens using aspheric e-value to control tear height to slow down the growth rate of the eyeball
I-Tsung Wu, Taipei (TW); Wen-Pin Lin, Taipei (TW); and Wen-Kai Li, Taipei (TW)
Assigned to BRIGHTEN OPTIX CORP., Taipei (TW)
Filed by BRIGHTEN OPTIX CORP., Taipei (TW)
Filed on Jun. 1, 2022, as Appl. No. 17/829,999.
Application 17/829,999 is a continuation in part of application No. 17/707,131, filed on Mar. 29, 2022, granted, now 12,197,046.
Application 17/829,999 is a continuation in part of application No. 16/707,519, filed on Dec. 9, 2019, granted, now 11,378,820.
Application 17/707,131 is a continuation in part of application No. 16/707,519, filed on Dec. 9, 2019, granted, now 11,378,820.
Application 16/707,519 is a continuation of application No. 16/158,833, filed on Oct. 12, 2018, abandoned.
Claims priority of application No. 106217150 (TW), filed on Nov. 17, 2017.
Prior Publication US 2022/0291524 A1, Sep. 15, 2022
Int. Cl. G02C 7/04 (2006.01); G02C 7/06 (2006.01)
CPC G02C 7/047 (2013.01) [G02C 7/041 (2013.01); G02C 7/061 (2013.01); G02C 2202/12 (2013.01); G02C 2202/24 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An orthokeratology lens that uses aspheric E-value to control tear height to slow down the growth rate of the eyeball, said orthokeratology lens being to be worn on a cornea surface of a preset eyeball, the surface of said orthokeratology lens being aspheric, said orthokeratology lens comprising a treatment zone through which light passes to image at a retina of said eyeball and a positioning zone of an non-visual area outside said treatment zone, said treatment zone comprising a base curve and a reverse curve formed on the outside of said base curve, said positioning zone comprising an alignment curve and a peripheral curve located outside said alignment curve, said orthokeratology lens being provided with said alignment curve and said peripheral curve of said positioning zone from the outer side of said base curve and said reverse curve of said treatment zone to the outside in sequence, a center point being formed in a center of said base curve, a junction of said base curve and said reverse curve forming a first point of intersection, a junction of said reverse curve and said alignment curve forming a second point of intersection, a junction of said alignment curve and said peripheral curve forming a third point of intersection, a linear distance between said center point of said base curve and said cornea of said preset eyeball being between 9 μm and 21 μm, a linear distance between said first point of intersection and said cornea of said preset eyeball being between 89 μm and 189 μm, an electronic device being used to simulate wearing said orthokeratology lens on said cornea, and a calculation formula being used to calculate the tear volume between said cornea and said base curve and said reverse curve of said preset orthokeratology lens, said calculation formula being: tear volume=

OG Complex Work Unit Math
where BCW is a width of said base curve of said lens, RCW is a width of said reverse curve of said lens, f1(x) is the inner surface of said base curve of said lens, and f2(x) is the inner surface of said reverse curve of said lens, said base curve further comprising a first optical center inner curve (BC1)custom character a second tear height inner curve (BC2), wherein an aspheric value [Ai] of said first optical center inner curve and said second tear height inner curve is:

OG Complex Work Unit Math
an eccentricity value (e) is:

OG Complex Work Unit Math
wherein a width ratio of said first optical center inner curve and said second tear height inner curve of said base curve of said orthokeratology lens is 2:1, and when a length of said second tear height inner curve is 6 mm, an angle of said first optical center inner curve is 1.78°, and a sum of an angle of said first optical center inner curve and an angle of said second tear height inner curve is 2.34°.