七年制醫(yī)學(xué)課件眼科3catarat-資料下載頁(yè)
2024-10-04 22:52本頁(yè)面
【正文】 s then adequate for insertion of the recently developed folding lenses. If a rigid intraocular lens is used, the wound needs to be extended to approximately advantages of smallincision surgery are more controlled operating conditions, avoidance of suturing, rapid wound healing with lesser degrees of corneal distortion, and reduced postoperative intraocular inf1amnationall contributing to more rapid visual rehabilitation. 1 The phacoemulsiflcation technique does, however, run the risk of posterior displacement of nuclear material through a posterior capsular tear, which generally necessitates plex vitreoretinal surgery. After all forms of extracapsular cataract surgery there may be secondary opacification of the posterior capsule that requires discission using the neodymium: YAG laser. Lens extraction through the pars plana during posterior vitrectomy is called phacofragmentation. This type of cataract removal is only performed in conjunction with the removal of an opaque or scarred vitreous. 1 Intracapsular cataract extraction, consisting of removal of the entire lens together with its capsule, is less frequently performed today. The incidence of postoperative retinal detachment and cystoid macularedema is significantly higher than after extra capsular surgery, but intracapsular surgery is still a useful procedure, particularly when facilities for extra capsular surgery are not available. 1 1 1 Visual correction of aphakia 1. Aphakic spectacles 2. Contact lens 3. IOL (hard and soft) 1 Thank you
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