Iyadoo aan loo eegin sababta aad ugu baahan tahay rijeeto sixitaan aragga dhow, bifocals dhamaantood si isku mid ah ayay u shaqeeyaan.Qayb yar oo ka mid ah qaybta hoose ee muraayadda ayaa ka kooban awoodda loo baahan yahay si loo saxo araggaaga dhow.Inta soo hartay muraayadda inta badan waxaa loogu talagalay aragtida fogaantaada.Qaybta lenska ee loo qoondeeyay hagaajinta aragga dhow waxay noqon kartaa mid ka mid ah qaabab badan:
• Dayax nus - waxa sidoo kale loo yaqaannaa dabaq-sare, toosan ama qayb D • Qayb wareeg ah • Meel leydi ah oo cidhiidhi ah, oo loo yaqaano qayb ribbon ah • Qaybta hoose ee buuxda ee muraayada laba-geesoodka ah ee loo yaqaanno qaabka Franklin, Executive ama E