The fundus oculi with an ophthalmascopic atlas, illustrating its physiological and pathological conditions / By W. Adams Frost.

  • Frost, W. Adams (William Adams), 1853-1935.
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: The fundus oculi with an ophthalmascopic atlas, illustrating its physiological and pathological conditions / By W. Adams Frost. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    from the posterior or short ciliary arteries (Fig. 5, Ah), which pierce the sclerotic round the optic nerve. The ciliary region is supplied by two long and numerous anterior ciliary arteries. The former (Fig. 5, Al) pierce the sclerotic one on either side of the optic nerve, then course forward between the sclerotic and choroid. The perforating branches of the anterior ciliary arteries, on the other hand, pierce the sclerotic about 5 mm. from the corneal margin. No distinction can be made between the smaller arteries and Fig. 5.—Diagram of the vessels of the choroid. (Graefe n. Saemisch.) A a. Anterior ; Al. long—A b. short—ciliary arteries ; Vv. venae vorticosae ; Cirri, circulus iridis major ; i. iris ; Pc. ciliary process ; Oc. ciliary muscle. veins of the choroid, but as the latter unite into larger trunks they assume a peculiar appearance owing to their being arranged in regular bold curves. The separate veins are nearly parallel but gradually converge, an arrangement which has led to their being called venae vorticosae (Fig. 5, Vv); finally all the veins are collected into six or eight large trunks which pierce the sclerotic somewhat obliquely near the equator.