Jyoti Kumarialmost 5 years ago

Persistent pupillary membrane

Persistent pupillary membrane (PPM,) which is a condition of the eye that has a strand of tissue crossing the pupil. The fetus uses the pupillary membrane as a source of blood supply for the lens. It wastes away after birth between the age of 4 to 8 weeks. Only large strands may disrupt the vision and a minimal amount of membrane tissue is considered non-harmful.