Ukuma kowesilisa kuya kowesifazane, okubuye kwaziwe ngokuthi ama-spacers noma izinsika ezinentambo, ziyizingxenye ezibalulekile ezisetshenziswa ezimbonini ezihlukahlukene ukudala isikhala nokuhlinzeka ngokusekela phakathi kwezinto ezimbili noma izingxenye. Njengomkhiqizi wezingxenyekazi zekhompuyutha ohlonishwayo oneminyaka engu-30 yesipiliyoni, siyaziqhenya ngokunikeza ikhwalithi ephezulu yabesilisa kuya kwabesifazane ehlangabezana nezidingo ezahlukahlukene zamakhasimende ethu.