ABSTRACT
A 45-year-old man with retinitis pigmentosa (RP), who had undergone uneventful extracapsular cataract extraction (ECCE) in his right eye eight years previously, and phacoemulsification in his left eye six years previously, had spontaneously dislocated intraocular lenses (IOL) within the capsular bag in both eyes one month apart. We removed the dislocated IOLs, and performed anterior vitrectomy and scleral fixation of the new IOLs. Mild contraction of the capsular bags and uneven distribution of the zonular remnants' clumps along the equator of the capsules were found by scanning electron microscopic (SEM) examination. In this study, we propose the correlation between RP and zonular weakness. To our knowledge, this is the first case report of bilateral spontaneous dislocation of IOLs within the capsular bag of an RP patient.
Subject(s)
Adult , Humans , Male , Foreign-Body Migration/etiology , Lens Capsule, Crystalline/pathology , Lens Implantation, Intraocular , Lenses, Intraocular , Ligaments/ultrastructure , Microscopy, Electron, Scanning , Phacoemulsification , Reoperation , Retinitis Pigmentosa/complications , VitrectomyABSTRACT
This study was undertaken to identify the mechanoreceptors in the cruciate ligament of rabbit. Ten fresh ligaments were taken from dissected knee joints of adult rabbits and stained immediately according to a modification of gold chloride technique. Three types of nerve endings [mechanoreceptors] were observed in the surrounding connective tissue and the septa between collagen fibers of the ligaments. The receptors of type I were ovoid or spherical, type II were elongated and tortuous and type III were fusiform in shape. Each type receptors had a capsule of variable lamellae, pierced by a myelinated nerve axon. These mechanoreceptors seemed to provide the central nervous system with information pertaining the position of joint and the tension applied to the ligament during animal locomotion and posture