Ensuring Perfect Vision Care with Right Lens

Many varieties of lenses, including ophthalmic lenses, contact lenses, intraocular lenses, filter and low vision instruments are often used to treat eye related diseases, to correct the refraction errors and to attain an improved and better vision. Ophthalmic optical lenses are prescribed based on the basic laws of geometrical optics and visual optics issues. Light plays a crucial role in the eye care as the wave length of the light increases visual light transmittance and decreases aberrations, and allows the lenses to project a clearer vision. Properties of the lenses are tested depending upon their physical and chemical characteristics and UVR and light transmittance analyses of ophthalmic optics lens are crucial in terms of eye health. Lenses were tested for their transmittance properties depending on the physical, chemical characteristics. The UVR and light transmittance analyses of ophthalmic optics lens are crucial in terms of eye health.

Physical characteristics involve the curvature of surfaces, vergence, categories of lens form, the diameter (R), base curve (BC), diopter (D), sagittal depth (S), surface-type (spherocylindrical), edge thickness (ET), optical center (OC), focal point(F), focal power (D) and refractive index (n) of the lenses. The chemical characteristics of ophthalmic lenses are classified as mineral lenses (crown, flint, borosilicate, heavy flint) and organic lenses (CR-39), high index, polycarbonate and trivex). Physical parameters such as diameter (55–70 mm), center thickness (1–5 mm), refractive index (1.50– 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.

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. The physical, chemical and optical characteristics should be evaluated prior to transmittance assessment of lenses. Since long ultraviolet radiation exposure causes various eye diseases, light transmittance value in the ultraviolet radiation region should be close 0%. Use of ophthalmic lenses with 85% and higher transmittance was suitable to ensure perfect eye care.