Central corneal thickness increased by approximately 13.81% in the immediate postoperative period (at 1 hour). It remained increased by 6.44% on day 1 compared with preoperative values and gradually reduced to preoperative levels by the 1-week postoperative period (0.57% difference). Intraocular pressure (IOP) measured postoperatively in the first week may be falsely elevated to some extent because of the increased corneal thickness in the immediate postoperative period; thus, not all IOP rises have be treated in this period in healthy uncompromised eyes.

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Aims To study the effect of haemodialysis on intraocular pressure (IOP) of patients at the University Malaya Medical Centre, Kuala Lumpur, and the influence of anterior chamber angles, surgery, and diabetes on the change in IOP after haemodialysis. Methods Prospective, single centre study on patients undergoing haemodialysis with a sample size of 98 eyes (49 patients). Ocular examination was performed before haemodialysis. Pre-and post-haemodialysis IOP measurements were taken. Plasma osmolarity changes and volume of fluid removed were noted. Patients on antiglaucoma treatment or who have had earlier laser or surgical procedures for it were excluded. Student's t-test and Pearson's coefficient test were used to determine the statistical significance. Results Plasma osmolarity decreased significantly (À11.6 ± 10.0mOsm/l, Po0.001). In eyes with occludable angles (8% of cases), IOP decreased significantly (À3.63 ± 1.92 mmHg, Po0.001). In non-occludable angle eyes (92% of cases), no significant changes (P40.05) in all subgroups of non-operated/operated and diabetic/ non-diabetic eyes were seen. Conclusions Haemodialysis does not cause significant changes in IOP in non-glaucomatous and non-occludable angle eyes.

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