Lab eye

Remove orbital plate 2.5 cm lateral to crista galliopen periorbita, depress orbital contents downwardSawcut: frontal bone from midsagittal 1.5 and 4 cm

Open periorbita

Extraocular muscles

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Cut LPS, SR, SO middleClean1. Superior b CN32. Nasociliary nerve-ciliary ganglion- short ciliary n- posterior ethmoidal n,a- anterior ethmoidal n,a- infratrochlear n supratrochlear a dorsal nasal a (end)3. Abducent n

Cut optic n and turn upwardCut LR

1. IR, IO2. Inferior b of CN33. Infraorbital a,n

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Superior division of CN3 sup SR, LPSNasocilaiary nerve

Ocular vessels: orbital branches of ophthalmic a

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Eyelid

Tarsal glands(meibomian gland)Elongated sebaceous gland

Tarsal gland

Gland of Moll

Modified sweat gland:lemen ขยายใหญ่ ไม่ขดเป็น

Meibomian (Tarsal) gland

Gland of Zeis (modified sebaceous gland)

Histological structure of the lacrimal gland

Tubulo-acinar serous gland: serous type

T

Secretory part : Tubular component acinar componentExcretory part: interlobular duct, intralobular duct

Structure of the eyeball

1. Fibrous tunic sclera, cornea2. Vascular tunic choroid, ciliary body iris3. Nervous tunic: retina

Histological structure of the eye wall

Sclera : Dense irregular connective tissue (type I collagen)

Histological structure of the cornea

Simple squamous epithelium

Non-keratinizedFree nerve ending

5 layers

Type I collagen

Lamellae //

Homogenous structure

Corneal endothelium

Corneal epithelium

Corneal fibers

Corneal endothelium

Double-layer epitheliumสรา้ง aqueous humorSimple columnar - ชัน้นอก: non-pigmented- ชัน้ใน: pigmented (melanin)

Ciliary body : 1. anterior portion : ciliary processes2. Posterior portion: เรยีบ

Ciliary muscles : smooth m.

Zonular fibers

Iris

1. Anterior surface: discontinuous layer of pigmented cells2. Stroma: fibroblasts, melanocytes, 3. Posterior surface: pigmented-nonpigmented cells - sphincter m : constricted pupil (circular) - dilator m: dilate pupil (radiate m)

Lens

Zonular fibers

Lens capsule: basal lamina

Subcapsular epithelium: anterior surface

Lens fibers: no cells

Retina

Retina

Pigmented cells OLM outer plexiform inner nuclear layer cells body of rod and cone photoreceptor layer

Inner plexiform layer

Ganglion cell layer

Optic nerve fiber

ILM