Lense e hlahang ho latela litaelo tsa laboratori ea lense e bitsoa Rx lens.Ka khopolo, e ka nepahala ho 1 °.Hona joale, boholo ba lense ea Rx e laeloa ke tekanyo ea matla a gradient ea 25. Ha e le hantle, litekanyo tse kang pupil distance, asphericity, astigmatism le axial position li etselitsoe ho finyella liphello tse ntle ka ho fetisisa (eseng feela botenya bo bongata).Lilense tsa likhalase tsa ho bala, ka lebaka la mamello e eketsehileng ea sebaka sa bana, tekanyo ea matla a gradient ke 50, empa ho boetse ho na le 25.
Li-tag:Rx lense, lense ea lengolo la ngaka, lense e ikhethileng