Serous detachment of the retina appears as the last stage of chronic edema. The photograph opposite shows a section through thick skin. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. La optica geometrica se basa en el concepto de rayo luminoso como trayectoria que siguen las particulas materiales emitidas por los cuerpos. Optic papilla medical definition merriamwebster medical. The establishment of this fact will be considered a reason for anticipating in the disk any manifestations of. The sensory retina is elevated by serous detachment through the posterior pole, leading to maximum vision decrease. A comparison of optic nerve head morphology viewed by spectral domain optical coherence tomography and by serial histology nicholas g. Loss of central visual field loss of visual acuity loss of color perception afferent pupil retrobehind bulbar eyeball two forms of optic neuritis papillitis retrobulbar neuritis optic nerveoptic nerve both forms of optic neuritis papilla optic disc retrobulbar 28. Este libro le da al lector nuevos conocimientos y experiencia. Thick skin like this is only found in areas where there is a lot of abrasion such as palms, fingertips, and soles of your feet. This article will deal mainly with the occurrence of uveal pigment, in the form of chromatophores in the lamina cribrosa, as a normal physiologic variation. Normally, visualization of individual papillae is difficult.
You should notice that the dermis extends up into the epidermis in structures called dermal papillae. The increase of intracranial tension is related with. Papillae are vascular changes seen most easily in the palpebral conjunctiva where fibrous septae anchor the conjunctiva to the tarsus. Original article dopaminergic amacrine cells in rabbit. Different presentations of intraretinal fluid collections. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Development of tongue the three lingual buds result from the proliferation of mesenchyme in ventromedial parts of the first pair of pharyngeal arches the distal tongue buds rapidly increase in size, merge with each other, and overgrow the median tongue bud the merged distal tongue buds form the anterior twothirds oral part of the. The histologic appearance of papillary conjunctivitis is identical, regardless of the cause. Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye. The term papilledema refers to the edema that appears in the optic papilla after intracranial hypertension.
Pigmentation of the optic nerve jama ophthalmology. Aggregated, it would be possible to talk about pathologies which affect all four articles. Pancreaticobiliary maljunction pbm is an unusual anomalous condition in which the pancreatic duct and bile duct merge outside the duodenal wall and form a long common channel. Periodontal biotyping affects practically all periodontal surgical procedures, including crown lengthening 44, implant placement 40, 42 and.
With progression, these dilated vessels sprout spokelike capillaries that become surrounded by edema and a mixed inflammatory cell infiltrate, producing raised elevations under the conjunctival epithelium fig 27. Some of its most frequent causes are intracranial lesions, hydrocephaly, thrombosis venous sinus and meningitis. A comparison of optic nerve head morphology viewed by. Pancreaticobiliary maljuction combining with pancreas. Case 3 a 60yearold female, with congenital optic disc pit in the left eye and vision worse than 0. Oblique facial cleft the maxillary prominence does not merge with its corresponding lateral prominence, leading to exposure of the nasolacrimal duct to the surface. The ganglion cell axons form the optic nerve after they leave the eye. His patient was a woman aged 62 who presented herself for examination because of glaucoma in the right eye. Periodontology 2000 soft tissue enhancement around. In papillary hypertrophy, the normal vascular pattern becomes obscured, and in extreme cases obliterated, by the inflammatory process when the individual septae separating papillae break down, multiple individual papillae merge to form a giant papilla.
The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye. Efeito fotoeletrico a natureza corpuscular da luz foi confirmada por compton 1911. Optic nerve head onh circulatory disorders together constitute one of the most important ocular vascular disorders e. Original article dopaminergic amacrine cells in rabbit retina. Las causas del mismo pueden ser congenitas o adquiridas.
To understand these disorders, a good basic understanding of the blood supply of the onh is a first essential. Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Special papillae coriales occur on the sensitive corium of. Examination of the left eye revealed vision of 2030, normal.