Comparison Photon Exposure and Energy Absorption Buildup Factors of CR-39 and Trivex Optical Lenses

Bilici, Sevim; Bilici, Ahmet; Külahçı, Fatih

doi:10.55525/tjst.1003130

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…In the study, when interpreting the UV transmittance of contact lenses, it was not included in the interpretation because the diopter was the same and the center thickness was approximately the same. In addition, the interpretation of the graphics is based on the American National Standards Institute (ANSI Z80.20-2016) [32]. UV transmittance values for ANSI sunglasses are attached to contact lenses.…”

Section: Results and Dıscussıonmentioning

confidence: 99%

Farklı Türden Kontak Lenslerin Ultraviyole Işık Geçirgenliğinin Ölçülmesi

BARLIK,

ATEŞ

2023

Turkish Journal of Science and Technology

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Scientific evidence showing the harmful effects of ultraviolet radiation on different ocular tissues has led manufacturers to incorporate UV-blocking monomers into contact lenses. In this study, the spectral and optical properties of contact lenses were analyzed in the ultraviolet and visible light wavelength ranges using the Jasco V-730 UV/VIS spectrophotometer device. The results obtained showed that in the lens samples examined, the light transmittance in the wavelength (550nm) range to which the human eye is most sensitive is over 70% and the maximum value is 72.98% in B contact lenses. The largest cutting edge wavelength value was obtained in the A contact lens as 376 nm. At 550 nm, the absorption spectra were found to be below 0.12. In terms of visual quality, visible light transmittance is expected to be high and ultraviolet light transmittance is expected to be minimal. The degree of damage caused by the amount of ultraviolet light absorption increases. Among the contact lenses with and without ultraviolet-protected monomers, lens A did not transmit the UV-B wavelength region, while lens B transmitted UV-A and UV-B wavelengths. This result showed that the protection of lens A was higher. It is seen that the UV transmittance taken with the phocometer is 45% UV in A lens and 91% UV in B lens. The results obtained by UV/VIS spectrophotometer and phocometer supported each other. The results will contribute to the literature by revealing the importance of UV-protected monomer-containing contact lenses in vision equipment, and by enabling the development and selection of full-protection contact lenses.

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Section: Results and Dıscussıonmentioning

confidence: 99%

Farklı Türden Kontak Lenslerin Ultraviyole Işık Geçirgenliğinin Ölçülmesi

BARLIK,

ATEŞ

2023

Turkish Journal of Science and Technology

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“…Many types of organic lenses, which are widely used in the optical industry with their chemical structure, composition, lightweight structure, processing and coatings, are available on the market. CR-39 and PC organic lenses used in this study belong to different companies and the necessary information for the lenses is given in Table 1 (Alonso, Gómez & Quiroga, 2019;Bilici, Bilici & Külahcı, 2022;Musikant, 1985;Ralph, Dain & Cheng, 2015). In Table 1, the letters A, B, and C represent three different firms, while those with a refractive index of 1.49 and 1.59 refer to CR-39 and PC organic lenses, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Spectacle lenses are basically divided into organic and mineral. Organic eyeglass lenses are widely used in the optical industry with their chemical structure and composition, processing and coatings, and have a lighter structure than mineral eyewear lenses (Bilici, Bilici, Külahcı, 2022;Alonso, Gómez & Quiroga, 2019;Ralph, Dain & Cheng, 2015). Therefore, organic glasses are largely preferred as a visual aid.…”

Section: Introductionmentioning

confidence: 99%

Bazı Organik Gözlük Camlarının Spektral ve Optik Özelliklerinin İncelenmesi

ATEŞ

Bilici

2023

İnönü Üniversitesi Sağlık Hizmetleri Meslek Yüksek Okulu Dergisi

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In this study, the spectral and optical properties of organic spectacle lenses used as visual aids were analyzed using Jasco V-730 UV/VIS spectrophotometer device in the ultraviolet and visible light wavelength ranges. The results obtained showed that the light transmittance in the wavelength (550nm) range to which the human eye is most sensitive in the lens samples examined was over 80% and that Polycarbonate (A3) lenses had a maximum value of 97.87%. The largest cut off edge wavelength value was found to be 390nm for the A3 lens. At 550 nm for all lenses, the absorption spectrum was below 0.07. In terms of visual quality, it is expected that the visible light transmittance is high and the ultraviolet light transmission is minimal. Our eyes are exposed to ultraviolet rays almost every day, and these rays cause damage to the ocular tissues. The degree of damage caused by the amount of ultraviolet light absorption increases. This situation is especially worrisome for young people and affluent individuals. Among the organic lenses with ultraviolet protection coating, the protection of the A3 lens was relatively higher. Furthermore, optical band gap energies were found to range from 3.145 – 4.155 and 2.994 – 3.936 for direct and indirect transitions, respectively. The highest optical band gap values were found to be those of the B1 and C1 organic lenses, respectively. The results will contribute to the awareness of spectacle wearers about eye health from an optical point of view, the selection of coatings applied to vision instruments for various purposes and the selection of lenses used in other optical areas.

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