continued from part 1 - Controller General of Patents, Designs, and ...

(12) PATENT APPLICATION PUBLICATION (21) Application No.6889/DELNP/2008 A
(19) INDIA
(22) Date of filing of Application :11/08/2008 (43) Publication Date : 24/10/2008
(54) Title of the invention : PSEUDO-ACCOMODATIVE IOL HAVING MULTIPLE DIFFRACTIVE PATTERNS
(51) International classification :G02C 7/06 (71)Name of Applicant :
(31) Priority Document No :11/350,505
1)ALCON RESEARCH LTD
(32) Priority Date :09/02/2006
Address of Applicant :6201 SOUTH FREEWAY TB 4-8,
(33) Name of priority country :U.S.A.
FORT WORTH, TEXAS 76134, U.S.A U.S.A.
(86) International Application No :PCT/US2007/061903 (72)Name of Inventor :
Filing Date
:09/02/2007
1)HONG, XIN
(87) International Publication No :WO 2007/092948 2)VANNOY, STEPHEN J.
(61) Patent of Addition to Application
Number
Filing Date
:NA
:NA
3)ZHANG, XIAOXIAO
(62) Divisional to Application Number :NA
Filing Date
:NA
(57) Abstract :
In one aspect, a trifocal ophthalmic lens is disclosed that includes an optic having a surface that comprises at least one trifocal
diffractive pattern and at least one bifocal diffractive pattern such that the bifocal pattern provides near and far vision and the trifocal
pattern generates near, far, and intermediate vision. For example, the trifocal pattern can provide near, far, and intermediate foci such
that the near and far foci are substantially coincident, respectively, with a near and a far focus of the bifocal pattern. In this manner,
the trifocal and bifocal patterns collectively provide near, intermediate, and far foci (or focal regions) corresponding, respectively, to
the near, intermediate and far vision.
No. of Pages : 34 No. of Claims : 29
The Patent Office Journal 24/10/2008 26269