Izinto ze-Glass zihambisana nayo yonke inkambo yokuthuthukiswa kwempucuko yomuntu. Izinhlobonhlobo zengilazi zihlala zicebile futhi zisetshenziswa kabanzi, ikakhulukazi izinto zengilazi ezikhethekile, ezidlala indima ebaluleke kakhulu futhi zisebenza ngokusebenza kwe-optical, kagesi, magnetic, mechanical, biological, chemical and thermal.
Sigxila ekwandiseni kobubanzi besicelo sengilazi ye-quartz nezinye izibuko ezikhethekile. Senze ucwaningo oluningi, ukuthuthukiswa kanye nokuhlolwa kwezinto zokwakha, ubuchwepheshe kanye nokusebenza, futhi siqonda kangcono izici nokusebenza kwesicelo sezinto ezihlukahlukene zeglasi ukuze sinikeze amakhasimende isisombululo esihle kakhulu.