Ophthalmic Lenses Ophthalmic Lenses Properties of Light UV,Visible,and Infrared Spectrums Reflection,Refraction, Absorption Lens Designs -Lens Materials
Ophthalmic Lenses ▪ Properties of Light ▪ UV, Visible, and Infrared Spectrums ▪ Reflection, Refraction, & Absorption ▪ Lens Designs ▪ Lens Materials
Ophthalmic Lenses Properties of Light Like the artist's paint,the eye requires light to see... ...what is "light,and how does it work?
Properties of Light Like the artist’s paint, the eye requires light to see... ...what is “light,” and how does it work?
Ophthalmic Lenses Properties of Light So what is light? particles in the form of a wave electromagnetic radiation with wavelengths between 400 and 7o0 nanometers(a nanometer is 1/1,o00,oooth mm) white light is composed of all wavelengths Electromagnetic Spectrum Radio Waves -+ 一μWaves Infra Red- 4—XRys 一YRas 110210410610810101021014101610181020102五
particles in the form of a wave electromagnetic radiation with wavelengths between 400 and 700 nanometers (a nanometer is 1/1,000,000th mm) white light is composed of all wavelengths Properties of Light So what is light?
Ophthalmic Lenses Properties of Light So what is light? visible light is a small portion of the spectrum EM surrounding the visible spectrum is hazardous Ultra-Violet is <4oonm 。Infrared is>76onm Electromagnetic Spectrum —Radio Waves Ultra Videt Infra Red- 4一XRys— 4—y Rays 110210410°10810101021014101610181020102五
visible light is a small portion of the spectrum EM surrounding the visible spectrum is hazardous ▪ Ultra-Violet is <400nm ▪ Infrared is >760nm Properties of Light So what is light?
Ophthalmic Lenses Properties of Light Ultra-Violet Radiation Ultra Violet Region of the Electromagnetic Spectrum UVA is less photobiologically active than UVB and consists of 0.3m light just beyond the blue end 30nm 3nm of the visible spectrum... Near Far Extreme UV UV UV
Properties of Light Ultra-Violet Radiation UVA is less photobiologically active than UVB and consists of light just beyond the blue end of the visible spectrum... A