Short official Latin term

Libelle of note

The Tunica fibrosa has been subdivided into the Sclera, the Cornea and the Limbus corneae, a transitional zone between sclera and cornea, of utmost importance for the maintenance of intra-ocular pressure, since the removal of aqueous humor occurs here. The terminology used follows Hogan MJ, Alvarado JA, Weddell JE (1971) Histology of the Human Eye. Saunders, Philadelphia, PA.

New term; the Venulae aquosae ('Wasservenen') were described by Ascher KW (1942) Am J Ophthalmol 25:31. They collect the Humor aquosus from the Sinus venosus sclerae, and drain into the Venae episclerales.

The Facies anterior of the iris has been subdivided into a Zona pupillaris and a Zona ciliaris, separated by the Catella or collarette (based on Geneser F 1986 Textbook of Histology. Munksgaard, Copenhagen).

The incorrect English terms (Depression of optic disc and Physiological cup) are replaced by: Optic disc excavation and Excavation of optic nerve head.

Each Palpebra contains a Canaliculus lacrimalis, often they combine to a Canaliculus lacrimalis communis before emptying into the Saccus lacrimalis.

Term not in TA: At the level of the Foramen nervi optici, the Periorbita is joined with the dural sheath of the Nervus opticus, and bridges as Membrana orbitalis the Fissura orbitalis inferior. The Musculus orbitalis consists of smooth muscle fibres within the Membrana orbitalis; replaced from Musculi externi bulbi oculi.

Heading Neura retinalia added, from TH; based on Kolb H, Linberg KA, Fisher SK 1992. Neurons of the human retina: A Golgi study. J Comp Neurol 318:147-187, and more recent studies (Website Kolb H et al. The Organization of the Retina and Visual System; http://webvision.med.utah.edu).

(from TH): The term Membrana basalis superficialis limbi posterioris was added, for developmental reasons, the epithelium of the posterior border does not have the usual basement membrane on its side facing the stroma, but superficially on the side facing the lens.

TH term 'multipolare' replaced by 'retinale' for consistency. There are at least 18 different morphological types of ganglion cells in the human retina, numbered from G1-G23 after Golgi studies (G = Golgi type) by Kolb et al. (1981 Vision Res 21:1081-1114) in cats. Special names have been given to the Midget and Parasol ganglion cells, projecting to the Parvocellular and Magnocellular layers of CGL.

Masland RH (2001 The fundamental plan of the retina. Nat Rev Neurosci 4:877-886) counted at least 29 types of Amacrine cells, most of them are glycinergic (Neuron amacrinum glycinergicum) or GABAergic (Neuron amacrinum GABAergicum).

A physiological subdivision of Cone bipolar cells includes ON-cone bipolar cells and OFF-cone bipolar cells, each with three to five disctinct types (Masland RH 2001. The fundamental plan of the retina. Nat Rev Neurosci 4:877-886).

More recently, these ganglion cells became known as Small and Large bistratified ganglion cells, giving rise to the Koniocellular pathway to the CGL (Dacey DM 2000 Parallel pathways for spectral coding in primate retina. Annu Rev Neurosci 23:743-775; Nassi JJ, Callaway EM 2009 Parallel processing strategies of the primate visual system. Nat Rev Neurosci 10:360-372).

TH's A11 corrected to AII (Roman numeral!). 'Aperturae angustae' corrected to 'campi angusti' as for the other amacrine cells. The Latin term has been divided into two. The Amacrine cell AI (Kolb and Famiglietti 1974 Science 186:47-49) was later renamed as A17. The term AII remained.

See note # 7674

New term; the Arteria cilioretinalis is a variant artery which leaves the Discus nervi optici separately from the Arteria centralis retinae. It may serve as an additional supply for the Macula lutea from the choroidal circulation. If present (10-30% of cases), it can spare central vision in occlusion of the Arteria centralis retinae.