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

(12) PATENT APPLICATION PUBLICATION (21) Application No.6890/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 DIFFRACTIVE ZONES WITH VARYING AREAS
(51) International classification :G02C 7/06 (71)Name of Applicant :
(31) Priority Document No :11/350,497
1)ALCON RESEARCH LTD
(32) Priority Date :09/02/2006
Address of Applicant :6201 SOUTH FREEWAY, FORT
(33) Name of priority country :U.S.A.
WORTH, TEXAS 76134-2099, U.S.A U.S.A.
(86) International Application No :PCT/US2007/061906 (72)Name of Inventor :
Filing Date
:09/02/2007
1)HONG, XIN
(87) International Publication No :WO 2007/092949 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 of the invention, a trifocal ophthalmic lens is disclosed that includes an optic having at least one optical surface, and a
plurality of diffractive zones that are disposed on a portion of that surface about an optical axis of the optic. At least two of those
diffractive zones have different areas so as to cause broadening of optical energy profiles at a near and a far foci of the diffractive
zones for generating an intermediate focus.
No. of Pages : 32 No. of Claims : 22
The Patent Office Journal 24/10/2008 26270