Edwards syndrome is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on the 18th chromosome, either in whole (trisomy 18) or in part (such as due to translocations).The additional chromosome usually occurs before conception.t is the second-most common autosomal trisomy, after Down syndrome, that carries to term. Edwards syndrome occurs in around one in 6,000 live births, and around 80% of those affected are female. The majority of fetuses with the syndrome die before birth. The incidence increases as the mother's age increases.
Dilating drops make the pupils of the eyes bigger so that the doctor can see the back of the eye. Because the pupils are bigger, you are more sensitive to light until the effect wears off, and it's a good idea to have sunglasses for use after the exam. Jupiterimages/Goodshoot/Getty Images.
The pupils look like round, black dots in the center of the eyes, but they are actually openings that allow light to enter the eyes. The size of the opening is controlled by the iris, the colored portion of the eye surrounding the pupil. The pupils constantly change size in response to light, to the eyeâs focusing distance, and to emotions. Normally, the pupils dilate (enlarge) in darker conditions to allow more light to enter the eye. The medical term for dilated pupils is mydriasis. Medications or other drugs can also cause the pupil to dilate, either intentionally or as a side effect. For example, eye care professionals often use eye drops that dilate the pupils in order to examine structures at the back of eye, such as the retina.