ShakeJ Bluelight Filter – 3.0

Try the 'ShakeJ blue light filter', which protects the eyes from the screen: ). "Blue-light" means the light's blue columns that exist in wavelengths between 380-500 nanometers. If a long time to see a blue light is decreased visual acuity and sleep inducing hormone secretion is reduced, also disturb sleep. Easily block blue light! Blue Light reduction filter applied.