Iiglasi ezibhlowu ezibhlohlo ziiglasi ezithintela ukukhanya okuluhlaza okwesibhakabhaka ukuba kungacaphukisa amehlo akho.Iiglasi ezikhethekileyo ezichasene nombala oluhlaza okwesibhakabhaka ziyakwazi ukwahlula ngokufanelekileyo i-ultraviolet kunye nemitha kwaye zinokuhluza ukukhanya okuluhlaza, okufanelekile kwikhompyuter okanye kusetyenziso lwefowuni ye-TV.