Human eyeball is made up of three layers viz. 1) Sclera, 2) Choroid and 3) Retina.
Blind spot: It is the place present in the posterior region of the eyeball where optic nerve leaves the eyeball. It is so called because the cells of the retina i.e. rods and cons are totally absent in this region.
Yellow spot: It is the small elevation of the retina present near the blind spot called macula lutea. It is compactly packed with cons and it appears yellow in colour so called yellow spot. It has high resolution.