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[Observations on early stage intraocular pressure after modern extracapsular cataract extraction]
1Department of Ophthalmology, Second Affiliated Hospital, Hebei Medical University, Shijiazhuang.
Objective:
To observe the early intraocular pressure (IOP) after extracapsular cataract extraction (ECCE).
Method:
ECCE was performed on 58 eyes which were randomly divided into 3 groups, and postoperatively, at various intervals the IOP was measured and compared.
Results:
The low IOP was not measurable by tonometer at 1 hour after the operation. At postoperative 3 hours, the mean IOP was higher than that of the preoperative level. The peak of IOP elevation was between postoperative 6-12 hours, over 2.80 kPa (1 kPa = 7.5 mmHg) and > or = 4.0 kPa were in 31 eyes (53.45%) and 4 eyes (6.90%) respectively, and the highest IOP was 4.40 kPa. Naturally, the levels of IOP resumed normal in all cases in postoperative 24 hours. The IOPs in 5 eyes (8.62%) were lower than the normal level (< 1.33 kPa) within 72 hours after the operation. The postoperative IOP of the group with diamox administered preoperatively was lower than that of the group with either mannitol or without drugs (P < 0.05) to lower the IOP preoperatively. The eyes with normal postoperative IOP accounted for the majority.
Conclusion:
Preoperative oral administration of diamox is a measure to prevent the early elevation of IOP after ECCE.