Abstract
Short-term observation following Nd-YAG laser capsulotomy indicates that serious elevation of intra-ocular pressure may occur, unrelated to the amount of energy used. In this study the IOP in 3 groups of 10 pseudophakic patients undergoing Nd-YAG laser posterior capsulotomy was measured before capsulotomy and 2 and 4 hours afterwards, using the fellow-eye as control. The first group received no medication, the second received timolol 1/2% eyedrops preoperatively, the third group a combination of timolol 1/2% and 1 tablet of acetazolamide 250 mg systemically. Pretreatment with timolol 0.5% minimizes IOP-rise but does not give complete protection. The combination of timolol 0.5% with 1 tablet of acetazolamide 250 mg proves to be a safe procedure for the prevention of IOP-rise after YAG laser capsulotomy. To prevent other complications it is advisable to make a small capsulotomy of 2-3 mm diameter using as little energy as possible. Also a defocussing system in the laser is a great advantage. Indomethacin drops during a period of 6 weeks after Nd-YAG laser capsulotomy should prevent cystoid macular edema.
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