Letter to the Editor: The transmittance of ophthalmic optic lenses, spectacle lenses

Abstract

4]. Physical parameters such as diameter (55–70 mm), center thickness (1–5 mm), refractive index (1.50–1.90), diopters (D), base curvature (BC) and focal point (F) of lenses are also important to determine the spectral transmittance results. According to the results, the UVR and visible-light transmittance within the spectrum depends not only on the composition of the eye-glasses but also on the lens thickness, the composition of the lens material, the index numbers and coating characteristics of the lenses [5] . The physical, chemical and optical characteristics should also be evaluated prior to transmittance assessment of lenses. Since long ultraviolet radiation exposure periods cause various eye diseases, light transmittance value in the ultraviolet radiation region shall be close 0%. Within the visible region, the use of ophthalmic lenses with 85% and higher transmittance was found to be suitable in terms of eye health and eye standards. Accordingly, in addition to the transmittance of spectacle lenses in this study, the future research will also focus on contact lenses and intraocular lenses.