Wow Wow Wow, Ophthalmology and Dissections

The Ball Collection, and I hope you're not bored to tears with it yet, continues to wow me. Here are the treasures I uncovered today, and no pun intended. All typos are mine alone.

Acc 20836-14 Dissection of the head to show the relation of the eyeball to the orbital margin, the course of the optic nerve, the position of the optic chiasma, the trochlear nerve in its whole course, the cavernous sinus, and the semilunar or Gasserian ganglion.






Acc 20836-10 The obicularis oculi muscle dissected away from the lateral side and swung medially to show the direct continuity of its pars lacrimalis with the pretarsal or pars tarsalis fibers which run along the lid margins. The relation to the upper part of the lacrimal sac, which has been exposed by cutting through the lacrimal fascia, is shown.




Acc 20836-8 Dissection of the eyelids, third stage. The orbicularis oculi and the septum orbitale have been completely removed, and the fore edge of the aponeurosis of the levator cut away to expose the tarsal plate; the orbital fat has been cleared away. The preparation shows the supra-orbital and supra-trochlear nerves, the pulley of the superior oblique muscle, the anastomosis between the ophthalmic and angular veins, the inferior oblique muscle with its so-called "check ligament" (the only instance of this structure the writer has met), and the lacrimal gland subdivided into its two parts by the lateral horn of the aponeurosis of the levator.





Acc 20836-6 The middle concha has been pulled upwards to expose the middle meatus. The position of the fossa for the lacrimal sac relative to this wall was ascertained by driving pins through from the opposite side and is outlined in black. Rods have been passed through the opening of the sphenoid sinus and down the infundibulum of the frontal sinus; the latter leads into the hiatus semilunaris, which is bounded above by the rounded bulla ethmoidalis and below by the processus uncinatus; the ostium maxillare of the antrum is also seen.




Acc 20836-9 The relations of the lacrimal gland. Dissection of the left orbit from above and also in front to show the aponeurosis of the levator palpebrae superioris muscle and the lacrimal gland. The pulley of the superior oblique and its tendon are also seen. Natural size.