Histofisiologi Indra Penglihatan (Indonesian) PDF
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Uploaded by QuieterSynecdoche9294
UPN Veteran Jakarta
Dr. dr. Wahyunia Likhayati S,M.Biomed
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Summary
This document is a presentation on the histophysiology of the human eye. It covers the different parts of the eye, including the sclera, cornea, choroid, ciliary body, iris, retina, and associated structures. It also details the function of each part and includes diagrams.
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Dr. dr. Wahyunia Likhayati S,M.Biomed Histofisiologi Indra Penglihatan Mata Merupakan organ fotoreseptor Diameter orbita 2,4 cm Embriologi Mata Otak depan → retina & n. optik Ektoderm permukaan →lensa & asesoris anterior Mesenkim →tunika & struktur as...
Dr. dr. Wahyunia Likhayati S,M.Biomed Histofisiologi Indra Penglihatan Mata Merupakan organ fotoreseptor Diameter orbita 2,4 cm Embriologi Mata Otak depan → retina & n. optik Ektoderm permukaan →lensa & asesoris anterior Mesenkim →tunika & struktur asesori orbita Tunika fibrosa Sclera Kornea Koroid Tunika vascular/uvea Badan Siliaris Iris Tunika neural Retina Sklera Putih opak, posterior 5/6 bola mata J. i. padat: kolagen I & elastin → bentuk bola mata Fibroblas, melanosit Episklera: j. Ikat Kapsula Tenon: selubung fascial yang menutupi saraf optik & orbita (sampai ke daerah siliar) Kornea Epitel berlapis gepeng tanpa keratin Epitel kornea Turn over rate : ± 7 hari Transfer air & ion dari stroma ke sakus konjugtiva Lamina fibrilar: kolagen I Membrana Bowman Disintesis oleh epitel kornea & stroma 90 % ketebalan kornea Stroma Kolagen I, elastik, kondroitin sulfat, keratan sulfat, fibroblas, limfosit, netrofil Pada limbus kornea (sklerocorneal junction) →sulkus sklera → trabekular meshwork →kanal Schlemm Membrana Descement Tebal: 5 μm (lahir), 17 μm (dewasa) Epitel selapis gepeng Endotelium kornea Sintesis protein untuk membran Descement Kornea Limbus Peralihan dari kornea menjadi sklera Descemet s̓ membrane and its simple endothelium are replaced with a system of irregular endothelium-lined channels called the trabecular meshwork the stroma at the corneoscleral junction and allow slow, continuous drainage of aqueous humor from the anterior chamber. This fluid moves from these channels into the adjacent larger space of the scleral venous sinus, or canal of Schlemm Tunika Vaskulosa (Uvea) Lapisan vaskular Terdiri dari: – Khoroid – Badan siliar – Iris Khoroid Lapisan vaskular berpigmen J. ikat longgar: kolagen, elastin, fibroblas Melanosit →warna hitam khoroid Membran Bruch: memisahkan khoroid dengan retina Badan Siliar Korpus Siliaris & Prosesus Siliaris Pelebaran khoroid, wedge shape Di atas lensa, di antara ora serata & iris J. ikat, elastin, vaskular, melanosit, otot polos 3 berkas otot siliaris: – 1 berkas meregangkan khoroid: mengubah bukaan kanal Schlemm – 2 berkas terikat scleral spur : mereduksi tegangan zonulae: kontraksi → meregang badan khoroid → melepaskan tegangan ligamen suspensor →lensa semakin tebal & konveks → fokus → akomodasi Badan Siliar Prosesus siliaris: – Produksi aqueous humor → r. posterior → pupil →r. anterior →trabecular meshwork → kanal Schlemm → sistem vena – Aqueous humor: suplai nutrisi & O2 lensa & kornea Zonula Siliar The ciliary zonule is a system of many radially oriented fibers composed largely of fibrillin-1 and 2 produced by the nonpigmented epithelial cells on the ciliary processes. The fibers extend from grooves between the ciliary processes and attach to the surface of the lens, holding that structure in place. Iris Pelebaran khoroid anterior, diafragma kontraktil: kontrol lubang pupil Permukaan anterior: – Epitel berpigmen + fibroblas – 2 cincin konsentris: zona pupilaris & zona siliaris Permukaan posterior: – Epitel ~ retina pars siliaris Iris Melanosit pada epitel & stroma: – Mencegah cahaya masuk – Warna mata: Hitam : melanosit >> Biru : melanosit