Anatomy

Lens (geology)

Biometrics

Fundus (uterus)

IRIS (biosensor)

Biology

Vitreous membrane

Ophthalmology

Paleontology

Computer science

Retinal detachment

Retinal

Anterior surface

Computer security

Medicine

American Journal of Ophthalmology

A six-months-old infant, one of twins born about two months prematurely, was found to have a grayish-white, opaque membrane behind each crystalline lens (frontispiece A and B). The pupillary responses were normal and the eyes transilluminated clearly. A jerky, irregular, and somewhat searching nystagmus was present. The membrane did not cover the entire posterior surface of the lens. Below at the extreme periphery, a clear fundus reflex could be obtained when the pupils were fully dilated. In this region thin dentate processes extended from the membrane peripherally as if they were attached to the ciliary processes (frontispiece, C and D).

Extreme Prematurity and Fibroblastic Overgrowth of Persistent Vascular Sheath Behind Each Crystalline Lens ∗