Table 1 Measured surface roughness of the three contact lenses.

From: Anti-amoebic and biocompatible properties of nephrite-embedded contact lenses

Clear contact lenses

Average roughness

(Ra)

Root-mean-square roughness

(Rq)

Ten-point mean height roughness

(Rz)

21.64

29.03

269.29

Cosmetic contact lenses

95.71

119.65

653.32

Nephrite-embedded

contact lenses

28.28

38.37

322.11

  1. All surface parameters were calculated according to the international surface roughness standard ISO 4287 (JIS B 0601 equivalent).
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