Measurement of Ultraviolet Light Transmittance of Different Contact Lens Types

Year 2023, Volume: 18 Issue: 2, 379 - 385, 01.09.2023

Ahmet Barlık Gonca Ateş

https://doi.org/10.55525/tjst.1314368

Abstract

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.

Keywords

contact lens, eye health, UV radiation, light transmission

Supporting Institution

Tübitak (2209-A)

Project Number

1919B012210596

Thanks

The application numbered 1919B012210596 within the scope of the 2209-A University Students Research Projects Support Program, carried out by the TÜBİTAK Scientist Support Programs Presidency (BİDEB) in the 1st term of 2022, was entitled to receive support. We would like to thank Şırnak University for enabling the use of the Technology and Research Center Laboratory in the spectral analysis of contact lenses with the UV/VIS Spectrophotometer device in the project titled "Measurement of UV Light Transmittance of Different Types of Contact Lenses".

Farklı Türden Kontak Lenslerin Ultraviyole Işık Geçirgenliğinin Ölçülmesi

Abstract

Ultraviyole radyasyonun farklı oküler dokular üzerinde zararlı etkilerini gösteren bilimsel kanıtlar üreticileri UV bloke edici monomerleri kontak lenslere dâhil etmeye yönlendirmiştir. Bu araştırmada, kontak lenslerin spektral ve optik özellikleri ultraviyole ve görünür ışık dalga boyu aralıklarında JASCO V-730 UV/Vis spektrofotometre cihazı kullanılarak analiz edildi Elde edilen sonuçlar incelenen kontak lens örneklerinde insan gözünün en duyarlı olduğu dalga boyu (550 nm) aralığında ışık geçirgenliğinin %70’nin üzerinde olduğunu ve maksimum değere %72,98 olarak B kontak lensin sahip olduğunu gösterdi. En büyük kesme kenarı dalga boyu değeri A kontak lensinde 376 nm olarak elde edildi.550 nm’de soğurma spektrumlarının ise 0.12 altında olduğu bulundu. Görme kalitesi açısından görünür ışık geçirgenliğinin yüksek olması, ultraviyole ışık geçirgenliğinin minimum olması beklenir. Ultraviyole korumalı monomer içeren ve içermeyen kontak lenslerden A lensinin UV-B dalga boyu bölgesini geçirmediği, B lensinin ise UV-A ve UV-B dalga boylarını geçirdiği görüldü. Bu sonuç A lensinin korumasının daha yüksek olduğunu gösterdi. Fokometre ile alınan UV geçirgenlikleri A lensinde %45, B lensinde %91 olarak görülmektedir. UV/Vis spektrofotometre ile fokometreden alınan sonuçlar birbirini destekledi. Sonuçlar, görme gereçlerinde UV korumalı monomer içerikli kontak lenslerin önemini ortaya çıkararak, tam korumalı kontak lenslerin geliştirilmesini ve seçilmesini sağlayarak literatüre katkı sağlayacaktır.

Keywords

Kontak lens, göz sağlığı, UV radyasyon, ışık geçirgenliği

Project Number

1919B012210596

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