| 摘要 |
PCT No. PCT/DE90/00535 Sec. 371 Date Mar. 18, 1991 Sec. 102(e) Date Mar. 18, 1991 PCT Filed Jul. 17, 1990 PCT Pub. No. WO91/01508 PCT Pub. Date Feb. 7, 1991.Disclosed is a progressive ophthamic lens having positive distance portion power, in which at least one surface is designed as a progressive area, and a distance portion (FT) intended for distant vision having practically constant distance portion power and a near portion (NT) intended for hear vision having practically constant near portion power including a progression zone (PZ), in which the surface refractive power increases from the surface refractive power (DF) present at the distant reference point (BF) along a curved of plane main meridian (HM) to the surface refractive power (DN) present at a near reference point (BN).
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