The tumble abrasion test proposed by J.M. Young and J.D.Masso has been modified in order to produce uniform scratching of the lens surface under test and in order to simulate closely damage which occurs during normal wear in the field. The uniformity of the abrasion enables a quantitative measurement of the abrasion resistance by a simple determination of the scattered light. The test has been applied to coated and uncoated plastic ophthalmic lenses. The results show that the scratch resistance of the coated lenses depends strongly on the composition and on the thickness of the coating.
H. P. Wegelin,
"Abrasion Testing Of Coated Plastic Lenses", Proc. SPIE 0896, Replication and Molding of Optical Components, (13 July 1988); doi: 10.1117/12.944473; https://doi.org/10.1117/12.944473