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A series of black-and-white or digital photographs are taken of the retina before and after the fluorescein reaches the retinal circulation (approximately 10 seconds after injection). The early images allow for the recognition of autofluorescence of the retinal tissues.
Kohl ( Arabic: كُحْل, romanized :kuḥl ), Kajal, Kajol, Surma, or Tiro is an ancient eye cosmetic, traditionally made by grinding stibnite for use similar to that of charcoal in mascara. It is widely used in the Middle East and North Africa and throughout the wider world, typically as eyeliner to contour or darken the eyelids.
Waardenburg syndrome is a group of rare genetic conditions characterised by at least some degree of congenital hearing loss and pigmentation deficiencies, which can include bright blue eyes (or one blue eye and one brown eye ), a white forelock or patches of light skin. These basic features constitute type 2 of the condition; in type 1, there ...
An eyelash (also called lash) (Latin: cilia) is one of the hairs that grows at the edges of the top and bottom eyelids, spanning outwards and away from the eyes. The lashes grow in up to six layers on each of the upper and lower eyelids. [1] Eyelashes serve to protect the eye from debris, dust, and small particles, and are highly sensitive to ...
Indocyanine green angiography. Indocyanine green angiography ( ICGA) is a diagnostic procedure used to examine choroidal blood flow and associated pathology. Indocyanine green (ICG) is a water soluble cyanine dye which shows fluorescence in near-infrared (790–805 nm) range, with peak spectral absorption of 800-810 nm in blood.
John Quincy Adams (1825–1829) was the first U.S. president to have notable facial hair, with long sideburns. [2] But the first major departure from the tradition of clean-shaven chief executives was Abraham Lincoln (1861–1865), [3] [4] [5] who was supposedly (and famously) influenced by a letter received from an eleven-year-old girl named Grace Bedell, to start growing a beard to improve ...
Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads. The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching .
A variety of human hair colors; from top left, clockwise: black, brown, blonde, white, red. Human hair color is the pigmentation of human hair follicles and shafts due to two types of melanin: eumelanin and pheomelanin. Generally, the more melanin present, the darker the hair. Its tone depends on the ratio of black or brown eumelanin to yellow ...