Adhesion of Asian Dust Particles to Verofilcon a Soft Contact Lenses

Figures & data

Table 1 Characteristics of the Contact Lenses

	Etafilcon A	Verofilcon A
Water Content (%)	58	Core 51 / Surface 80
Oxygen Permeability (Dk)	28	90
Oxygen Transmissibility (Dk/L)	33.3	100
Diameter (mm)	14.2	14.2
Base Curve (mm)	9.0/8.5	8.7/8.3
CT (mm)	0.084	0.09
Color	Blue	Light blue
Surface (Ionic/Non-ionic)	Ionic	Non-ionic
FDA group	IV	II
USAN Nomenclature	Etafilcon A	Verofilcon A
Principal Components	2-HEMA, MA	mPDMS, GPDMS, NVP

Abbreviations: CT, Center thickness of contact lens; FDA, Food and Drug Administration; USAN, United States adopted names; HEMA, 2-Hydroxyethyl methacrylate; MA, methacrylic acid; mPDMS, mono-methacrylate poly dimethylsiloxane; GPDMS, Glycerol-functionalized polydimethylsiloxane; NVP, N-vinyl pyrrolidone.

Figure 1 Representative photographs of Asian dust particles on the surface of soft contact lenses (SCLs) before washing, after rinsing, and after vortexing with physiological saline. Bars = 100 µm.

Figure 2 Comparison of the number of Asian dust particles adhering to the soft contact lenses (SCLs) in an area of 200 µm × 200 µm in the central part of the SCL before washing, after rinsing, and after vortexing with physiological saline between etafilcon A and verofilcon A SCLs.

Figure 3 Percentage of the 200×200 µm surface area with adherent Asian dust particles for each soft contact lens (%).