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Scanning Electron Microscopy Findings With Energy-Dispersive X-ray Investigations of Cosmetically Tinted Contact Lenses.

Hotta F, Eguchi H, Imai S, Miyamoto T, Mitamura-Aizawa S, Mitamura Y - Eye Contact Lens (2015)

Bottom Line: We analyzed the surfaces and principal elements of the colorants of five commercially available Cos-CLs using scanning electron microscopy with energy-dispersive x-ray analysis.In the other lens, colorants were found in the most superficial layer on the posterior surface, although a coated layer was observed.Colorants may be deposited on the lens surface and consist of an element that has tissue toxicity.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology (F.H., H.E., T.M., S.M.-A., Y.M.), Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan; and Division of Chemistry (S.I.), Institute of Socio-Arts and Sciences, The University of Tokushima, Tokushima, Japan.

ABSTRACT

Objective: To investigate the surfaces and principal elements of the colorants of cosmetically tinted contact lenses (Cos-CLs).

Methods: We analyzed the surfaces and principal elements of the colorants of five commercially available Cos-CLs using scanning electron microscopy with energy-dispersive x-ray analysis.

Results: In two Cos-CLs, the anterior and posterior surfaces were smooth, and colorants were found inside the lens. One lens showed colorants located to a depth of 8 to 14 μm from the anterior side of the lens. In the other lens, colorants were found in the most superficial layer on the posterior surface, although a coated layer was observed. The colorants in the other three lenses were deposited on either lens surface. Although a print pattern was uniform in embedded type lenses, uneven patterns were apparent in dot-matrix design lenses. Colorants used in all lenses contained chlorine, iron, and titanium. In the magnified scanning electron microscopy images of a certain lens, chlorine is exuded and spread.

Conclusions: Cosmetically tinted contact lenses have a wide variety of lens surfaces and colorants. Colorants may be deposited on the lens surface and consist of an element that has tissue toxicity.

No MeSH data available.


Related in: MedlinePlus

Scanning electron microscopy images and mapping analysis of TUTTI VANITY RICH. (A) Colorants are deposited on the anterior side. (B) The surface of the posterior side is smooth. (C) Blue shows the distribution of iron. (D) Green shows the distribution of oxygen.
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Figure 4: Scanning electron microscopy images and mapping analysis of TUTTI VANITY RICH. (A) Colorants are deposited on the anterior side. (B) The surface of the posterior side is smooth. (C) Blue shows the distribution of iron. (D) Green shows the distribution of oxygen.

Mentions: Colorants were deposited on the anterior surface, although the posterior surface was smooth (Fig. 4A,B). Colorants on the anterior side were deposited heavily in the periphery, and a dot-patterned print was overglazed in the midperipheral area (Fig. 4A). Oxygen and iron were painted heavily on the peripheral side of the print and painted as a dot-pattern in the midperiphery (Fig. 4C,D).


Scanning Electron Microscopy Findings With Energy-Dispersive X-ray Investigations of Cosmetically Tinted Contact Lenses.

Hotta F, Eguchi H, Imai S, Miyamoto T, Mitamura-Aizawa S, Mitamura Y - Eye Contact Lens (2015)

Scanning electron microscopy images and mapping analysis of TUTTI VANITY RICH. (A) Colorants are deposited on the anterior side. (B) The surface of the posterior side is smooth. (C) Blue shows the distribution of iron. (D) Green shows the distribution of oxygen.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4561626&req=5

Figure 4: Scanning electron microscopy images and mapping analysis of TUTTI VANITY RICH. (A) Colorants are deposited on the anterior side. (B) The surface of the posterior side is smooth. (C) Blue shows the distribution of iron. (D) Green shows the distribution of oxygen.
Mentions: Colorants were deposited on the anterior surface, although the posterior surface was smooth (Fig. 4A,B). Colorants on the anterior side were deposited heavily in the periphery, and a dot-patterned print was overglazed in the midperipheral area (Fig. 4A). Oxygen and iron were painted heavily on the peripheral side of the print and painted as a dot-pattern in the midperiphery (Fig. 4C,D).

Bottom Line: We analyzed the surfaces and principal elements of the colorants of five commercially available Cos-CLs using scanning electron microscopy with energy-dispersive x-ray analysis.In the other lens, colorants were found in the most superficial layer on the posterior surface, although a coated layer was observed.Colorants may be deposited on the lens surface and consist of an element that has tissue toxicity.

View Article: PubMed Central - PubMed

Affiliation: Department of Ophthalmology (F.H., H.E., T.M., S.M.-A., Y.M.), Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan; and Division of Chemistry (S.I.), Institute of Socio-Arts and Sciences, The University of Tokushima, Tokushima, Japan.

ABSTRACT

Objective: To investigate the surfaces and principal elements of the colorants of cosmetically tinted contact lenses (Cos-CLs).

Methods: We analyzed the surfaces and principal elements of the colorants of five commercially available Cos-CLs using scanning electron microscopy with energy-dispersive x-ray analysis.

Results: In two Cos-CLs, the anterior and posterior surfaces were smooth, and colorants were found inside the lens. One lens showed colorants located to a depth of 8 to 14 μm from the anterior side of the lens. In the other lens, colorants were found in the most superficial layer on the posterior surface, although a coated layer was observed. The colorants in the other three lenses were deposited on either lens surface. Although a print pattern was uniform in embedded type lenses, uneven patterns were apparent in dot-matrix design lenses. Colorants used in all lenses contained chlorine, iron, and titanium. In the magnified scanning electron microscopy images of a certain lens, chlorine is exuded and spread.

Conclusions: Cosmetically tinted contact lenses have a wide variety of lens surfaces and colorants. Colorants may be deposited on the lens surface and consist of an element that has tissue toxicity.

No MeSH data available.


Related in: MedlinePlus