Contact Lens Primer Monica Chaudhry
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Contact Lens Milestone1

1508
Leonardo de Vinci described contact lens.
1845
John Herschel—theoretical application of CL.
1888
Adolph Fick—used glass shells on rabbit corneas. Trials using glass as lens material.
1934
PMMA material patented—John Crawford and Rowland hill. Development of PMMA material
1937
CAB lenses.
1948
Kevin Tuohy—12 mm corneal lenses.
1954
Experiments on HEMA lens material by Otto Witchterle and Drahoslav Lim.
1961
HEMA patented.
1970
Hydrogels era—rapid developments in designs.
1972
First RGP lens—silicon acrylates.
1981
First cosmetic extended wear (HEMA)
1984
Disposable lenses (Orlando Battista—gave the concept of 1st collagen lens).
1989
Hybrid—soft perm lenses.
1994
Daily disposable lens. Newer and newer designs of hydrogels—toric/bifocal/ multifocals.
2
zoom view
Fig. 1.1: Tree of contact lens
2000
Continuous wear lens material—Siloxane containing hydrogels.