Welcome, Guest: Register On Nairaland / LOGIN! / Trending / Recent / New
Stats: 3,236,871 members, 8,103,535 topics. Date: Thursday, 13 March 2025 at 02:07 PM

The History Of Progressive Addition Lens - Fashion - Nairaland

Nairaland Forum / Entertainment / Fashion / The History Of Progressive Addition Lens (66 Views)

Does A Woman Have Any Temperament? In Addition To Hairstyle, She Wears Clothes / The History Of Hoodies / Customising In Lagos State Nigeria. The History Of Cusomising (2) (3) (4)

(1) (Reply)

The History Of Progressive Addition Lens by byrong(m): 9:24am On Mar 04
In 1907, Owen Aves first proposed the concept of progressive addition lens (PAL), marking the birth of a new concept of presbyopia correction. The design inspiration of progressive lens comes from the shape of elephant's trunk, that is, the curvature of the front surface of the lens increases continuously from the top to the bottom of the lens, so that the refractive power of the lens increases continuously from the far use area at the top of the lens until the required near use refractive correction degree is reached in the near use area at the bottom of the lens.

In 1959, after years of research and development, Frenchman Bernard Maitenaz designed the first generation of progressive lenses that can be used for clinical wear, which made progressive lenses - this new visual correction method - win the attention of the world and soon was widely promoted in many countries. Due to the limitations of technology and the lack of clinical application research at the time, the first generation of progressive lenses failed to achieve the expected clinical wearing effect.

With the development of computers, advanced design software and instruments are applied to the design and development of eyeglass lenses, which has made great progress in the design of progressive lenses. The general trend is: from a single, hard, symmetrical, spherical far vision zone design to a diversified, soft, asymmetrical, aspherical far vision zone design.

The initial progressive lens design mainly focused on mathematical, mechanical, and optical issues. With a more comprehensive understanding of the visual system, modern and future progressive lens design will increasingly focus on the connection between progressive lenses and physiological optics, human behavior, aesthetics, psychophysics, etc.

(1) (Reply)

How To Choose The Perfect Pearl Wedding Earrings For Your Bridal Dress? / Need A Flyer Or Banner For Your Brand? I’ll Design For Free! / Where Beads Tell Stories

(Go Up)

Sections: politics (1) business autos (1) jobs (1) career education (1) romance computers phones travel sports fashion health
religion celebs tv-movies music-radio literature webmasters programming techmarket

Links: (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Nairaland - Copyright © 2005 - 2025 Oluwaseun Osewa. All rights reserved. See How To Advertise. 8
Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or uploads on Nairaland.