The serosanguinous fluid can appear pinkish in color due to the small amount of blood cells that mix with the serous drainage. The consistency of this exudate is watery and thin and typically appears during the healing of wounds.
Bifocals are often prescribed for presbyopia. Bifocals are eyeglasses that have two different prescriptions in one spectacle lens. The top part of the lens corrects for distance vision and the lower portion of the lens is designed to help a person see objects up close.
bifocals, page 16 Â© W. F. Long, 1992A double segment is has an additional add at the top of the lens. It is anoccupational lens for painters, pilots, and the like.The top segment may be obtained in any power. The near correction can behad in a bifocal or trifocal.