OcuShield for the iPhone 7 is a tempered glass screen protector that protects our eyes when we are looking at our digital device. All modern digital devices produce harmful blue light. This short wavelength light is known to cause eye strain and fatigue, as well as to increase the likelihood of eye diseases. It also suppresses the hormone melatonin, disturbing our sleep-wake cycle. OcuShield protects your eyes and sleep by cutting out the blue light transmittance, but allowing the non-harmful light through the screen to give you clear and normal images.