At your eye line you can't see above of below the shelves, but for the ones above your eye line (you are looking up to) and can only see their undersides, and for the ones below you eyeline (you are looking down at those and can only see their top surfaces).
Wasiirrada Wasaaradaha Deegaanka, Qorshaynta iyo Arrimaha gudaha oo iyaguna kulankaasi ka hadlay, ayaa dhankooda sheegay inay dedaal balaadhan ku bixin doonaan wixii kala gudboon, ka wasaarad ahaan, waxaana ay hogo-tusaaleeyeen qaabka ugu fudud ee dadkaasi loogu gurman karo.