1. Ha ho na masala sebakeng sohle, RFU <5;
2. Ts'ebetso e phahameng ea ho otla: Ho latela lits'ebetso tse fapaneng tsa litsamaiso le laser, ho otla ho ka ba ka hare ho metsotsoana e 0,5;
3. Likarolo tsohle tsa litlhokile tse hlophisitsoeng li entsoe ka boikhethelo, li sebetsoa ebe li bokane, le tsamaiso ea taolo ea mantlha e ntlafalitsoe ka boithati;
4. Li-optictic tsa laser le lilaro tsa tharollo e ka hlophisoa haholo ho latela litlhoko tse fapaneng tsa bareki
