Kev faib cov cwj mem cim yog nyob ntawm lawv cov cwj mem. Feem ntau, cov cwj mem tuaj yeem muab faib ua cov lus qhia zoo thiab cov lus qhia dav.
Cov cwj nrag uas ua los ntawm cov cwj mem zoo nkauj yog qhov nyuaj thiab ntse, nrog cov xim sib xws. Lawv feem ntau yog siv los piav qhia thiab kos cov ntsiab lus me me, xws li dot-like and line-like area.
Tus cwj mem ntawm cov cwj mem dav dav yog tiaj tus thiab square, uas yog hom cwj mem zoo rau cov cwj mem. Cov hlab ntsha yog qhov muag muag, cov xim yog nplua nuj thiab tag nrho, thiab cov qauv nrog cov granular zoo nkauj tuaj yeem tsim. Vim muaj ntau qhov kev hloov pauv ntawm lub kaum sab xis ntawm tus cwj mem, qhov sib txawv ntawm cov hlab ntsha tawg ua los ntawm tus cwj mem yog qhov tseem ceeb. Yog li ntawd, lawv feem ntau yog ua haujlwm rau qee cov xim sau thiab txheej.
