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On, a transplant may be performed earlier than otherwise indicated by the visual performance, as these factors may require a larger than normal transplant button size and/or increase the chance of rejection if allowed to advance too far. Healing after corneal transplant the healing process following transplant is long, often taking a year or longer. viagra without a doctor prescription The time from surgery to the removal of the stitches is commonly 6 to 17 months (kirkness et al 1990; troutman and lawless 1987). The patient may be on steroids for months. Initially following surgery the donor button is swollen and even following healing the button is usually thicker than the corneal bed in which it rests. The photo on the left shows a thick white ring of scarring between the donated button and the patient's outer cornea. The white radial marks are where stitches were placed to hold the transplant in position. buy cheap viagra Graft rejection reactions occur in 11% to 18% of the patients (kirkness et al 1990; troutman and lawless 1987). buy viagra Signs of graft rejection include ciliary flush, anterior chamber flare, keratic precipitates, khodaoust line and krachmer's spots. viagra online in uk Signs of graft rejection are reported to occur from 1 month to 5 years following surgery (kirkness et al 1990). what is cheaper viagra viagra viagra The rejection rate for bilateral grafts is higher than if only one eye is grafted. In the bilateral cases, when a rejection reaction occurs it is commonly in both eyes. viagra soft tabs information If the second eye is to be grafted, there is usually a period of at least a year between grafts. cost of viagra 10 mg If signs of rejection occur, aggressive treatment with steroids is begun. Usually the reaction is overcome and the graft remains clear. Over 90% of the corneal grafts are successful with some studies reporting 97% to 99% success rates at 5 and 10 years (kirkness et al 1990, troutman and lawless 1987, epstein). Large amounts of astigmatism are common following keratoplasty. One study found an average of 5. 56 dc with a range from 0 to 17 d following suture removal (kirkness et al 1990), with other studies showing an average of 5. 4 dc (troutman and lawless 1987) and 4. viagra soft tabs information 5 dc (smiddy). The patient's spectacle prescription may fluctuate for some months following surgery. Refractive changes and keratometry or corneal topography can be used to follow the healing process. viagra generic Contact lenses after surgery most transplants have significant astigmatism and often some distortion requiring correction with contact lenses made of rigid materials. Many factors make fitting contacts after transplant a challenge. viagra soft tabs information It is common for the edge of the transplant to be slightly raised with respect to the surrounding cornea. The graft is usually steeper than the normal cornea, and may be tilted with respect to the surrounding tissue. To combat high amounts of astigmatism some of the sutures may be removed early. Following healing a relaxing incision or a wedge resection may be done to decrease the astigmatism. buy viagra cheap In any case there is.
Date Created: Thu Aug 21 13:56:08 2008