1. Orbscan 2. Pentacam three. Corneal Topographers and Wavefront Aberrometers: Complementary instruments four. Corneal Ectasia Post-Lasik: The Orbscan virtue five. Orbscan Corneal Mapping in Refractive surgical procedure 6. The Orbscan IIz Diagnostic process and Swage Wavefront research 7. abnormal Astigmatism: Lasik as a Correcting instrument eight. Decentered Ablation nine. Presbyopic Lasik 10. Conductive Keratoplasty for altering Corneal Curvature eleven. Corneal Topography in Cataract surgical procedure. Amar Agarwal is the pioneer of Phakonit, Microphaconit, No Anesthesia Cataract surgical procedure, FAVIT and Aberropia. he's the 1st on the earth to exploit the trypan blue for staining epiretinal membrane and mixed surgical procedure of microphaconit (700 m cataract surgical procedure) with a 25 gauge vitrectomy. he's additionally the 1st to implant a brand new reflect telescopic IOL and a glued IOL. Prof. Agarwal has bought many awards for his works performed in Ophthalmology, the main major being the Barraquer award and the Kelman award. He has written greater than forty books which were released in a number of languagesEnglish, Spanish and varnish. He additionally trains medical professionals from around the globe in his heart on phaco, bimanual phaco, lasik and retina. he's additionally Professor of Ophthalmology at Ramachandra scientific collage in Chennai, India. He may be contacted at: email@example.com. Athiya Agarwal is a superb instructor and she or he plays No Anesthesia Cataract surgical procedure, Phakonit and lasik with severe ease. She practices at Dr. Agarwals Eye clinic, Chennai, India. Dr. Athiya Agarwal has bought many video awards for her paintings performed in Ophthalmology. She has received awards on the ASCRS, ESCRS and AAO. She additionally conducts classes at overseas meetings. Soosan Jacob is a Senior advisor Ophthalmologist in Dr Agarwals Eye sanatorium, Chennai, India. She is a gold medalist in Ophthalmology. She has received many foreign awards at prestigious foreign meetings within the united states. She has performed classes and added lectures in different nationwide and foreign meetings. She has authored quite a few chapters in 27 textbooks by means of overseas and nationwide publishers and can be the affiliate Editor for a booklet on refractive surgical procedure.
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Additional info for Jaypee Gold Standard Mini Atlas Series: Corneal Topography
Age, attempted correction, the optical zone diameter and the flap thickness are other parameters that have to be considered to avoid post Lasik ectasia. The flap thickness may not be uniform throughout its length. In studies by Seitz et al, it has been shown that the Moris Model One microkeratome and the Supratome cut deeper towards the hinge, whereas the Automated Corneal Shaper and the Hansatome create flaps that are thinner towards the hinge. Thus, accordingly, the area of corneal ectasia may not be in the center but paracentral, especially if it is also associated with decentered ablation.
In a Scheimpflug camera, the three planes are not parallel but intersect in a line, called the “Scheimpflug line”. When the lens is tilted such that it intersects the film plane, the plane of sharp focus also passes through the Scheimpflug line, extending the depth of focus. Note that this results in mild image distortion, which is then corrected by the Pentacam system. 1. When performing a scan, two cameras are used to capture the image. One centrally located camera detects pupil size and orientation, and controls fixation.
Elevation data measured using this technique has several advantages. Because it is independent of axis, orientation and position, it yields a more accurate representation of true corneal shape. Thus, the Pentacam’s curvature map, because it is not sensitive to position, is theoretically more accurate. The elevation maps are created using one of three reference bodies: a best fit sphere, an ellipse of revolution, and toric. The best fit sphere calculation approximates the sphere as accurately as possible to the true nature of the cornea.
Jaypee Gold Standard Mini Atlas Series: Corneal Topography by Agarwal