The optic disc is placed 3 to 4 mm to the nasal side of the fovea. It is a vertical oval, with average dimensions of 1.76mm horizontally by 1.92mm vertically. There is a central depression, of variable size, called the optic cup. This depression can be a variety of shapes from a shallow indentation to a bean … Zobacz więcej The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye. Because there are no rods or cones overlying the optic disc, it corresponds to a small blind spot in each eye. The ganglion … Zobacz więcej • Megalopapilla: a non-progressive condition in which the optic disc is enlarged (diameter exceeding 2.1 mm) with no other … Zobacz więcej • Blood flow in the optic disc revealed by holographic laser Doppler imaging. • Local direction of blood flow with respect to the optical axis revealed by the Doppler spectrum … Zobacz więcej The optic disc or optic nerve head is the point of exit for ganglion cell axons leaving the eye. Because there are no rods or cones overlying the … Zobacz więcej The eye is unique because of the transparency of its optical media. Almost all eye structures can be examined with appropriate optical equipment and lenses. Using a modern direct ophthalmoscope gives a view of the optic disc using the principle of … Zobacz więcej • Optic disc pallor Zobacz więcej • Diagram at Moorfields Eye Hospital • Diagram at Ballard Optical • Retinal Vein Pulsation Is in Phase with Intracranial Pressure and Not Intraocular Pressure Zobacz więcej WitrynaThe system categorized the ONH as small (<1.5 mm), medium (1.5–2.0 mm), or large (>2.0 mm). 13 This could help to reduce the misclassification bias based on the disc …

Evaluation of the lamina cribrosa in different stages of diabetic ...

Witryna9 maj 2024 · The Cirrus SD-OCT algorithm calculates the peripapillary RNFL thickness at each point on the circle of 3.14 mm 2 centered on the optic disc. Four-quadrant (superior, nasal, inferior, and temporal) RNFL thicknesses were used for analysis. Witryna2 sty 2024 · Nasal step defects are caused by optic nerve disorders that affect the long, arching axons that originate temporal to the macula, entering the disc superiorly or inferiorly. A nasal step may begin as a … mammoth camper for sale

Understanding visual field defects in Glaucoma …

Witryna21 lip 2024 · Nasal hypoplasia of the optic disc (NHOD) is a congenital anomaly characterized by hypoplasia of the nasal portion of the optic disc with thinning of the … Witryna1. Optic disc pallor horizontally.. 2. VF (tangent screen, Humphrey, or Goldmann) and color vision testing. 3. The VF defect is a junctional scotoma due to a lesion of the … Witryna14 kwi 2024 · Thickness was divided into four quadrants (superior, temporal, inferior, and nasal areas), and the average thickness of each quadrant was recorded. pRNFL and mGCC thicknesses were graded from 1 to 4 according to the age- and sex-adjusted Asian population distribution provided by the NIDEK Co. database. ... Optic disc … mammoth car fridge factories