PRESCRIPTION LENSES AND AUXILIARY LENSES THEREOF

Title:

PRESCRIPTION LENSES AND AUXILIARY LENSES THEREOF

Document Type and Number:

WIPO Patent Application WO/2007/060554

Kind Code:

A1

Abstract:

A pair of prescription auxiliary lenses (21) adapted to the releasably attached to a pair of spectacles (1), the pair of spectacles (1) comprising a pair of main lenses (11): each of the main lenses (11) being changing the focal length, progressive, prescription lenses having an upper portion (11A) for distance viewing, a central portion (11C) for intermediate viewing, and a lower portion (11B) for reading viewing: the pair of auxiliary lenses (21) being for overlaying and changing the focal length of the upper portion (11A) to that of the central portion (11C).

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Inventors:

YANG WAH KIANG (SG)

Application Number:

PCT/IB2006/051855

Publication Date:

May 31, 2007

Filing Date:

June 12, 2006

Export Citation:

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Assignee:

NANYANG OPTICAL CO PTE LTD (SG)
YANG WAH KIANG (SG)

International Classes:

G02C7/08; G02C7/06; G02C9/00

Domestic Patent References:

WO2001081987A1	2001-11-01
WO2002086598A1	2002-10-31

Foreign References:

US6027214A	2000-02-22
US5644374A	1997-07-01

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