Corrective Lenses

Holly ShaferTEED 1103Prof: CarterTechnology Assessment

Origins Rome- 100 B.C.

Glass bottle filled with water Reading stone- 1000 A.D. First spectacles were made between

1268 and 1289 Quartz lenses held together by wood,

bone, leather, or metal

Problems: How to keep them on

Spain- 17th century- ribbons of silk China- ceramic & metal weights Edward Scarlett of London- 1730

Ridged side pieces James Ayscough- 1752

Double hinged side pieces Silver Spectacles

Evolution of corrective lenses Concave lenses- 16th century Monocle – early 18th century Bifocals: Benjamin Franklin- 1870s Scissor-glasses – 18th century Lorgnette – 18th century Pince-nez – 19th century

Materials: Glass Plastic- 1940s Hi-Index Polycarbonate Trivex Aspheric

Anti-reflective Coatings

Scratch-Resistant Coatings

Ultraviolet Treatments

Polarized Lenses Photochromatic

Lenses

Process:

video

How do corrective lenses work?

Modern Corrective Lenses Styled frames made of different

materials- plastics, metals, composites Contact lenses:

Vision correction As an accessory

Surgery: LASIK

PRK/ASA Implanted contacts

Social Impacts 14th century Europe

French Partisan aristocrats Spain Bifocals Monocle

WWI- German Military

~Benefits that you are not aware of~

Negative impacts on society: Visual distortation

Extremely poor vision Name calling

Impacts on culture & society 1456 - Gutenberg's invention of the

printing press 1841- Andrew Jackson 1879 - Thomas Edison's light bulb 1926 – Television Computers

Timeline

Weighing in on the:Negative Benefits

Temporary solution

Prevent self healing

Eye strain Social stigma

Positive Benefits

Improved vision Read books Read from afar Drive