Pigmentary Layer

Labelled diagram of the structure of the retina

Labelled Diagram of the Eye

Labelled diagram of the structure of the retina

Labelled Diagram of the Eye

The Pigmentary Layer (also known as the "Tapetum Nigrum") is the tenth (10th) of the layers forming the retina of the human eye.

Recall that light from outside the human body enters the eye through its main structures of the cornea, aqueous humour, pupil, lens, etc. and is normally focussed onto the retina of the eye.

The retina is composed of several layers which, together, form the "screen" in the eye onto which an image of the area viewed by the eye is formed, and information about that image is segmented into packets of information that are passed to the visual cortex of the brain via the optic nerve.


The pigmentary layer (or "Tapetum Nigrum") is the most external - i.e. the most distant from the centre of the eye, layer of the retina. It consists of a single layer of hexagonal epithelial cells that contain pigment granules. The posterior (external) surface of these epithelial cells is smooth, and in contact with the choroid layer. The internal surfaces of these pigmented cells takes the form of straight processes extending inwards between the rods - as shown in the pigment layer at the top right-hand side of the top-right image on this page.

Note that the pigmentary cells are also present in albinos, the key difference being that in their cases the pigment granules are not present.


For more information about related subjects see:

In the News:

In the News:

Psychological benefits of different types of natural environments - 2 Nov '17

Short simple mindfulness training could help drinkers reduce alcohol intake - 24 Aug '17

Health uses of the drumstick tree (India) - 2 May '16

Harnessing the healing properties of honey to help combat antimicrobial resistance - 29 Apr '16

Aromatherapy Book wins Botanical Literature Award (USA) - 19 Feb '16

Yoga practice associated with better general wellness - 5 Nov '15

Prisoners who do yoga might benefit psychologically - 11 Jul '13

Acupuncture can help treat lung disease - 17 May '12

Never worry, it blocks divine communication from Angels. Instead, be open to positive outcomes.

This is not medical, First Aid or other advice and is not to be used for diagnosis or treatment. Consult an expert in person. Care has been taken when compiling this page but accuracy cannot be guaranteed. This material is copyright.

IvyRose Holistic Health 2003-2017.