However, it is more fragile than most people realize. The shelf life of milk is influenced by a variety of factors, such as processing method and carton date, exposure to light and heat, and how it is stored.
A small, circumscribed area visibly different in colour or texture from the surrounding tissue. blind spot A visual field defect in which there is such a marked contraction of the peripheral temporal visual field that it lies on, or nasal to, the blind spot.
A particular blind spot known as the physiological blind spot, blind point, or punctum caecum in medical literature, is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc of the retina where the optic nerve passes through the optic disc.