Pupil

Synonyms in a broader sense visual hole Definition The pupil forms the black center of the colored iris. It is through this iris that light enters the eye and travels to the retina, where it leads to the signal transduction that is responsible for the creation of a visual impression. The pupil is variable in … Pupil

Pupillary Reflex | Pupil

Pupillary Reflex The adaptation of the pupil to the prevailing light situation is achieved by the so-called pupillary reflex. A distinction is made between the part that receives the information about the exposure and transmits it to the central nervous system (afference) and the part that, after processing this information, leads to the activation of … Pupillary Reflex | Pupil

How does eye colour come about?

Anatomy & Physiology The colored ring of our eye/eye color is called iris (rainbow skin). The iris consists histologically of several layers. The layer that is decisive for the eye colour is called stroma iridis, where stroma means connective tissue. This layer consists mainly of collagen fibres and fibroblasts, i.e. cells that produce components of … How does eye colour come about?

Interesting facts about eye colour | How does eye colour come about?

Interesting facts about eye colour About 90% of the world population has brown eyes. – Especially among Europeans, most newborns are born with blue eyes. The formation of melanin by the melanocytes does not begin until the first weeks of life, so that the final eye colour only shows after a few months to years. … Interesting facts about eye colour | How does eye colour come about?

Different eye colour between the eyes | How does eye colour come about?

Different eye colour between the eyes A difference in eye color between the two eyes of a person is medically called iris heterochromia. This can be congenital due to genetic dispositions or genetic mutations. If someone is born with heterochromia, one should clarify whether a syndrome may also be associated with hearing loss. Furthermore, a … Different eye colour between the eyes | How does eye colour come about?

Choroid

Synonyms in a broader sense Vascular skin (Uvea) Medical: Choroidea English: choroid Introduction The choroid is the rear part of the vascular skin (uvea) of the eye. It is embedded between the retina and the sclera as a central sheath. The iris and the ciliary body (corpus ciliare) also belong to the vascular skin. With … Choroid

Physiology | Choroid

Physiology The choroid contains many blood vessels. These have a total of two functions. The first important task is to feed the outer layer of the retina. These are mainly the photoreceptors, which receive and transmit the light impulses. The retina also consists of several layers. The inner layers are supplied with blood by a … Physiology | Choroid