Study On The Refraction And IOP After Scleral Bucking Surgery

Retinal detachment clinical multiple lines Encircling scleral outside pressure to enhance closed hole, satisfied with the results Scleral buckling Surgery in widespread clinical application, but after surgery associated with refraction changes such as myopia and astigmia and so on also have been doctors and patients concerned. As the eye is a sealed optical system, in scleral buckling and other foreign forces under the eye conformational change including the ocular axis, corneal shape, anterior chamber depth, lens thickness, intraocular pressure changed leaded to eye system changing. As cornea is the most important refractive, surface minor changes will significantly affect the retina objects in the definition, therefore, a comprehensive and accurate understanding of preoperative and postoperative corneal shape was very important. Scleral buckling Surgery Clinical application has almost 50 years, this method may lead to the refractive intraocular pressure changes and the results vary .This study observed scleral buckling surgery was ocular axial length, mean power, astigmatism, astigmatism axial and intraocular pressure changes, discussing changes to clinical guidelines provide a basis for treatment. Material and Method1. General information and group : 57 eyes of 57 patients from September 2006 to January 2007 of simple hole-induced detachment of retina who for the first time were measured. Man was 32, and woman 25. Age was 20-60 years, mean age 48.26±20.13 years. Right eye was 30 cases, left eye 27 cases. The compared eye was healthy eye of himself; the observed eye was trouble eye.2. Selected criteria : 57 eyes of 57 patients from September 2006 to January 2007 of simple hole-induced detachment of retina who for the first time Subject to the following conditions : (a) PVR grade A or B grade; (2) patients who have lens; (3) before and after surgery corneal transparency; (4) no previous history of eye surgery; (5) Subject to retinal detachment and related eye changes, no other eye diseases; (6), patients with clear eyes were refractive state.3. Inspection and follow-up : the compared eye was healthy eye of himself. In operation before, after postoperative 3 weeks, 6 weeks, 12 weeks for refraction (axial length, mean power, astigmatism astigmatism axial) and intraocular pressure checked. Ocular axial length measured using A-type ultrasonic wave; mean power, astigmatism, astigmatism axial using Orbscan ;Iop using non- contact tonometer.4. Statistical analysis : data use x|-±s, application of SPSS 10.0 software. Mean power, astigmatism, astigmatism axial paired t test. The ocular axial length and IOP before and after surgery used with repetitive data measurement analysis of variance and LSD test, a= 0.05 for a standard test.ResultThe results showed : ocular axial length of observed eyes prolorged after operation, as compared with preoperation P<0.01. Difference was statistically significant. Groups postoperation all were not significant, encircling the dancers and the axial length is directly related. Postoperative mean power of corneal anterior float was smaller, especially in 5mm area changed significantly, the central area changing small. Mean power to change was most obvious in 3 weeks postoperation, then gradually resuming after 6 weeks postoperation, 12 weeks being basic stability, with close to the preoperative level. Mean power of posterior float was not changed. Postoperative corneal astigmatism of anterior float increasted. Central area increased significantly in 3 weeks, then gradually resuming after the operation in 6 weeks. But astigmatism in 5 mm area continued to increase , and in 12 weeks was higher than the preoperative level. Astigmatism of posterior float was not changed. Astigmatism axial in anterior float changed significantly. But 5mm area changed small, its change of central significantly in 3 weeks postoperation. In 6 weeks gradually resumed , and 12 weeks basic stable. Astigmatism axial of posterior float was not changed. Iop of observed eyes increased after operation. Preoperative Iop were lower, Iop of postoperation increased apparently.conclusionScleral Bucking Surgery can cause change of refractive state and Iop. Astigmatism axial changed in the short styles. It suggested that its change need not treat and need conduct clinical observation. And change of mean power and astigmatism required close observation and treated accordingly. Increased Iop generally showed scleral bucking surgery correcting hypotony caused by simple rhegmatogenous retinal detachment effective. But it also needed close observation of elevated intraocular pressure effecting eye tissues. Ophthalmolgist should be minimized to change the shape of cornea, fastening with appropriate tolerance, reducing change of refractive state, maintaining a relatively normal Iop.