Mhlawumbe ungumphathi wokuthenga we-retinoscope , ofuna i-retinoscope ephezulu ye -retinoscope , futhi i-mecanmed ingumenzi ochwepheshe nomhlinzeki ongahlangabezana nezidingo zakho. Hhayi nje kuphela -retinoscop i Sinikezela nge-inthanethi, insizakalo yesikhathi esifanele futhi ungathola ukuholwa ngochwepheshe kwi -retinoscope . Unganqikazi ukuxhumana nathi uma unentshisekelo nge -retinoscope , ngeke sikuyeke phansi.