Biomedical subjects

C S Leon

Publications and source records attributed to C S Leon.

4 recordsLinked to original sources

PubMed2000

Endoscopic technique for suturing posterior chamber intraocular lenses.

A challenge of the sutured posterior chamber intraocular lens (IOL) technique is to perform blind actions behind the iris. To avoid imprecise transscleral sutures and complications, we use an endoscopic procedure with 2 goals: to control the entry site of the needle penetration and of the haptic location. The endoscopic technique allows retroiris control during transscleral suturing and iridociliary IOL implantation. It is a safe, precise method that avoids the risks of blind procedures behind the iris.

Cataract Extraction↗

PubMed1995

Endoscopy under operating microscope. A new device.

Existing technical conditions make it difficult for a single surgeon to simultaneously observe the endoscope and the observation field of the operating microscope. Video endoscopy is not adapted, because it respects neither the constraints of microsurgery (the surgeon has to stop observing the binoculars of the microscope to watch the video screen) nor the micromanipulations necessary for the specialties using micro endoscopy. A new device is described that closely joins endoscope and microscope. This coupling device allows the surgeon to permanently control and alternate the images according to his choice. The surgeon is able to observe in the binoculars the images transmitted by the endoscope and/or the operating microscope. This device respects the requirements of the microscope and, thanks to its optical capabilities, the endoscopic image is improved. The professions requiring double observation will improve their ability in diagnosis and therapy.

Endoscopes↗

PubMed1991

Microendoscopic ocular surgery: a new intraoperative, diagnostic and therapeutic strategy. Part I: Endoscopic equipment/methodology applied to cataract surgery with intraocular lens implantation.

During posterior chamber implantation, endoscopy is the only direct method that allows objective observation of the retroiridal space. We use it to define the parameters of the posterior chamber intraocular lens (isolation, inertia, centering). An oval endoscopic probe is preferred and the multivision system allows observation of the endoscopic images under the operative microscope eyepiece. Beside "blind" posterior chamber implantation, a "controlled" endoscopic posterior implantation can be defined.

Anterior Chamber↗

PubMed1991

Microendoscopic ocular surgery: a new intraoperative, diagnostic and therapeutic strategy. Part II: Preliminary results from the study of glaucomatous eyes.

Endoscopy allows intraoperative examination of the retroiridal space; this procedure has been used during the combined surgery of trabeculectomy, extracapsular extraction, and posterior chamber intraocular lens implantation. Information obtained by preoperative gonioscopic examination of the iridocorneal angle is presented with information obtained by intraoperative endoscopic examination of the iridocorneal and ciliary angles. Our initial endoscopic findings are impressive and include morphological analysis of ciliary processes, variations in their appearance, degree of opening of the iridociliary angle, and study of ciliary capillaries.

Adult↗