作者: MOCK 時間: 2025-3-21 23:52
Scheimpflug Camera-Based Systemscorneal surfaces, corneal pachymetry and anterior chamber depth. The effects of misalignment and eye movement can be reduced by using a dual Scheimpflug system with two cameras. The accuracy of measurements can be improved by incorporating Placido imaging into the device.作者: 諄諄教誨 時間: 2025-3-22 02:51
Corneal Surface Diseaseall-scale changes that disrupt the image quality. Local elevations or depressions produce corresponding small areas of steepening or flattening..Local peripheral lumps such as a pterygium or bleb produce flattening due to filling in of the limbus, subepithelial sclerosis and an exaggerated tear film meniscus at its margin.作者: SLING 時間: 2025-3-22 06:46 作者: 格子架 時間: 2025-3-22 09:34 作者: Accomplish 時間: 2025-3-22 15:01
https://doi.org/10.1007/978-1-4614-7064-9gorithms applied to each point on the two-dimensional mire image generate a three-dimensional interpretation of the corneal shape. The accuracy centrally is approximately 0.15D, which drops more peripherally and in irregular corneas.作者: Accomplish 時間: 2025-3-22 20:24 作者: 惡意 時間: 2025-3-23 00:46 作者: 酷熱 時間: 2025-3-23 02:39
Projection-Based Systemse projection-based technique most commonly used in commercial systems is slit photography, which gives an accuracy similar to other commercially available devices. However, the other techniques have potentially a higher accuracy and other advantages but need further development before being introduced to regular clinical practice.作者: 侵蝕 時間: 2025-3-23 09:37 作者: micturition 時間: 2025-3-23 13:16
Papers on Linear Recurrence Relationscorneal surfaces, corneal pachymetry and anterior chamber depth. The effects of misalignment and eye movement can be reduced by using a dual Scheimpflug system with two cameras. The accuracy of measurements can be improved by incorporating Placido imaging into the device.作者: 諂媚于人 時間: 2025-3-23 15:17
Papers on History and Biographyall-scale changes that disrupt the image quality. Local elevations or depressions produce corresponding small areas of steepening or flattening..Local peripheral lumps such as a pterygium or bleb produce flattening due to filling in of the limbus, subepithelial sclerosis and an exaggerated tear film meniscus at its margin.作者: 粉筆 時間: 2025-3-23 21:48 作者: NORM 時間: 2025-3-23 23:25 作者: Flinch 時間: 2025-3-24 02:43 作者: frivolous 時間: 2025-3-24 07:00
Melanie Corbett,Nicholas Maycock,David O‘BrartProvides detailed guidance on the clinical applications of corneal topography.Covers the latest technological advances in the field.Explains the principles underlying each technology.Highlights pros a作者: refine 時間: 2025-3-24 11:50
http://image.papertrans.cn/c/image/238275.jpg作者: ITCH 時間: 2025-3-24 18:33
https://doi.org/10.1007/978-3-030-10696-6Corneal disease; Corneal shape; Corneal surgery; Optical coherence tomography; Scheimpflug camera system作者: 粗魯?shù)娜?nbsp; 時間: 2025-3-24 20:25
Springer Nature Switzerland AG 2019作者: 截斷 時間: 2025-3-25 03:08
Papers on History and Biographyo corneal power using the refractive index of the cornea..Reflection-based techniques (including keratometry and videokeratoscopy) require a smooth corneal surface and in fact measure the anterior surface of the tear film. Projection-based techniques (including slit images) are able to measure eleva作者: 思想 時間: 2025-3-25 05:51
https://doi.org/10.1007/978-1-4614-7064-9ndicular meridian at a diameter of about 3 mm and is a highly accurate measure of the central curvature of regular corneas. Photokeratoscopes view the reflected image of the black and white concentric rings of a Placido disc, providing qualitative shape information across a large area of the cornea.作者: GRIN 時間: 2025-3-25 09:30 作者: 玩忽職守 時間: 2025-3-25 13:08 作者: bisphosphonate 時間: 2025-3-25 17:32
Computer algorithms and software packagesthe data and its subsequent display as a colour-coded contour map which adds considerable value to the investigation. Additional displays include cross sections and three-dimensional wire nets..When viewing the output, before looking at the map, it is important to check the patient details and date,作者: Gleason-score 時間: 2025-3-25 23:20 作者: 燒瓶 時間: 2025-3-26 01:29
Short Tutorial on Dynamical Modelseepest and flattest areas of the cornea and generating a simulated fluorescein pattern, it can direct the selection of the initial back surface curvature to be tried, thereby reducing the number of trial lenses required. It can also inform the design of custom design lenses..Corneal irregularity can作者: Mammal 時間: 2025-3-26 06:05
Papers on History and Biographycompressing the central cornea causes central flattening, whereas one compressing the peripheral cornea will cause secondary central steepening..Disturbances of the tear film can cause focal drying with localised flattening or more widespread irregularity. Epithelial disease often causes multiple sm作者: 思想上升 時間: 2025-3-26 10:55
Short Tutorial on Dynamical Modelsately adjacent area as the curvature returns to normal..When more layers of stroma are involved, particularly eccentrically, distant compensatory effects occur due to transmission of forces through the tensions within the cornea. Stability of the corneal shape is normally maintained by densely packe作者: yohimbine 時間: 2025-3-26 13:01 作者: 缺陷 時間: 2025-3-26 20:16 作者: 大包裹 時間: 2025-3-26 23:16 作者: 高興去去 時間: 2025-3-27 03:07 作者: 向前變橢圓 時間: 2025-3-27 07:43
Jacques-Antoine Gauthier,Eric D. Widmere from the superficial or anterior cornea (e.g. keratectomy and excimer or femtosecond laser procedures), topography can underestimate the change in corneal power because the algorithms assume a normal corneal thickness when calculating the total corneal power..Preoperative topography is valuable in作者: Merited 時間: 2025-3-27 12:08 作者: AMITY 時間: 2025-3-27 15:14
to corneal topography currently available. It is anticipated that this second edition will become the seminal corneal topography textbook for all with an interest in corneal disease?and?its management, and refractive surgery.978-3-030-10696-6作者: 犬儒主義者 時間: 2025-3-27 18:02 作者: extinct 時間: 2025-3-28 00:36
Computer algorithms and software packagesings, pupil, steep and flat meridian and a measurement grid. Multiple map displays can include various measures at one time point (e.g. including posterior corneal shape or pachymetry), serial maps over time or difference maps (subtraction of an earlier map from a later one)..Numerical and statistic作者: 積習(xí)難改 時間: 2025-3-28 03:30 作者: multiply 時間: 2025-3-28 08:12
Short Tutorial on Dynamical Modelsgmatism, oblate pattern (flattening centrally and steepening towards the periphery) and a steep-flat pattern with flattening under an eccentric lens with corresponding steepening elsewhere. If the steepening is inferior, this may mimic keratoconus. Warpage tends to reverse after several weeks withou作者: 哄騙 時間: 2025-3-28 10:28
Can a T-Cell Vaccine Block Escape?ism. With further progression, the “bows” of the “tie” may meet in the inferior periphery, producing a pattern resembling a more inferior keratoconus. Keratoglobus has a more even thinning affecting the whole cornea, which expands more symmetrically, with relatively little effect on the refraction..作者: STING 時間: 2025-3-28 16:27
Deterministic Modeling: A Cautionary Exampleflat, horseshoe or trefoil..In all types of anterior segment surgery, incisions have greater effect if they are longer, deeper, more vertical and nearer the centre of the cornea. Wound misalignment, either horizontally or vertically, can cause irregular astigmatism. Sutures should be sufficiently lo作者: 密碼 時間: 2025-3-28 19:09 作者: biopsy 時間: 2025-3-29 00:46
Jacques-Antoine Gauthier,Eric D. Widmerusing regression), epithelial ingrowth beneath a LASIK flap or progressive ectasia if too little tissue has been left in the corneal bed..Laser thermokeratoplasty corrects low degrees of hyperopia by inducing thermal contraction of collagen fibres in a ring of spots around the midperiphery of the co作者: Boycott 時間: 2025-3-29 03:03 作者: 微塵 時間: 2025-3-29 07:30
Assessment of Corneal Shape it can detect subclinical stages, monitor progression and provide measurements prior to surgery. Preoperatively, topography can help plan corneal interventions or intraocular lens implantation. Postoperatively, topography can help with monitoring healing, identifying the cause of visual problems or作者: START 時間: 2025-3-29 12:40 作者: Ambulatory 時間: 2025-3-29 15:36 作者: Phenothiazines 時間: 2025-3-29 20:28 作者: 影響 時間: 2025-3-30 00:19
Corneal Ectasiaism. With further progression, the “bows” of the “tie” may meet in the inferior periphery, producing a pattern resembling a more inferior keratoconus. Keratoglobus has a more even thinning affecting the whole cornea, which expands more symmetrically, with relatively little effect on the refraction..作者: 能夠支付 時間: 2025-3-30 05:36 作者: 占卜者 時間: 2025-3-30 12:06 作者: 碳水化合物 時間: 2025-3-30 16:10
Refractive Laser Surgeryusing regression), epithelial ingrowth beneath a LASIK flap or progressive ectasia if too little tissue has been left in the corneal bed..Laser thermokeratoplasty corrects low degrees of hyperopia by inducing thermal contraction of collagen fibres in a ring of spots around the midperiphery of the co作者: 間諜活動 時間: 2025-3-30 18:50 作者: 按時間順序 時間: 2025-3-30 20:42
Assessment of Corneal Shapeo corneal power using the refractive index of the cornea..Reflection-based techniques (including keratometry and videokeratoscopy) require a smooth corneal surface and in fact measure the anterior surface of the tear film. Projection-based techniques (including slit images) are able to measure eleva
