公开(公告)号：JPH09197353A

公开(公告)日：1997-07-31

申请号：JP34967496

申请日：1996-12-27

Applicant: ESSILOR INT

Inventor： NIKORASU SHIYATOO ,  KORIINU GUROORIERU ,  DOMENIKU BOODO

IPC: A61F2/14 ,  G02B3/10 ,  G02B5/23 ,  G02C7/04 ,  G02C7/06 ,  G02C7/10

Abstract: PROBLEM TO BE SOLVED: To improve the optical performance by providing at least two correction areas and varying the transparency in inverse proportion to the illuminance. SOLUTION: A multifocal contact lens 10 has at least two correction areas, i.e., a near eyesight correction area ZNV for correcting near eyesight and a far eyesight area ZDV for correcting far eyesight. This multifocal contact lens 10 has concentric annular areas around its optical axis A. In this case, the multifocal contact lens 10 is a central NV contact lens. Namely, the near eyesight area ZNV of the contact lens is in the center and the far eyesight area ZDV is at the periphery. And, the transparency of this multifocal contact lens 10 varies in inverse proportion to the illuminance. In detail, this multifocal contact lens 10 is formed out of a hard material or flexible material which decreases in transparency as the illumiannce increases.