Glaucoma topical preparations are generally found safe in terms of sterility, though bacterial growth may be found in a small percentage. In most cases, the cause of the loss of sterility could not be determined. However, in two preparations, contamination was related to the noncompliance of the patient who continued using the same preparation longer than instructed. It is imperative to increase the awareness of glaucoma patients to the fact that improper use can lead to eye-drop contamination.

Brimonidine tartrate caused significant miosis, especially under scotopic conditions, most likely from its alpha-2 adrenergic effect. Under photopic luminance conditions, the miotic effect was pronounced.

Oculab Tono-Pen tonometry was compared with Goldmann applanation tonometry in 82 eyes of 82 patients with normal corneas and in 54 eyes of 54 patients who had undergone penetrating keratoplasty and whose corneas did not preclude the use of the Goldmann tonometer. We found that the intraocular pressure (IOP) This instrument has certain advantages over the Goldmann applanation tonometer. It is portable and compact, can be used regardless of the patient position, is easy to calibrate and operate, has a disposal tip cover which eliminates contamination risks, and the digital readout minimises user bias. Because of its small contact diameter (1I5 mm) the Tono-Pen was recommended for the measurement of the IOP in eyes with irregular corneas. ' Our goal was to try to find if the IOP differences between Tono-Pen and Goldmann in normal eyes would be similar in post-keratoplasty eyes which often have large and irregular astigmatism. In addition, we wanted to find a correction factor for the Tono-Pen which could be used to make it clinically comparable with the Goldmann tonometer. Figure 1 shows the regression line of the TonoPen IOPs compared with Goldmann IOPs (y= 0 87,x+5 63, correlation coefficient 0-83) in eyes with regular corneas. Table 1 compares the measurements of both tonometers, in terms of mean paried differences and mean absolute value of paired differences in normal eyes. The analysis is divided into several Goldmann tonometry based IOP intervals. There were significant differences between the two instruments (-3 59 (SD 0 36) mm Hg, p<0-oo0l). Figure 2 displays the distribution of paired IOP differences in the group of normal eyes. Most of the measurements are situated left of the zero, representing overestimation of the TonoPen; only 52% of the Tono-Pen measurements 538 on 11 May 2018 by guest. Protected by copyright.

A case of acute orbital haemorrhage induced by labour is reported in a woman giving birth for the eighth time. The diagnosis was confirmed by computed tomography. The haemorrhage subsided spontaneously within three weeks. The mechanism of orbital haemorrhage following certain kinds of strain is discussed.

ABSTRACT.Purpose: To present the first documentation of iris retraction syndrome in eyes with nonrhegmatogenous retinal detachment. Patients and Methods: One patient with age-related macular degeneration and another with panuveitis developed exudative retinal detachment with iris retraction configuration. Ultrasound biomicroscopy was performed to investigate the anatomic relationship of structures in the anterior segment of the eye. Results: Ultrasound biomicroscopy demonstrated a severe backward bowing of the peripheral iris with irido-ciliary body and irido-zonular contact as well as broad iris lens touch. The iris retraction syndrome resolved after pupil dilation and disruption of the pupillary adhesions in both cases. The retinal detachment resolved several months later, without surgery. Conclusion:Iris retraction syndrome appears not to be exclusive to rhegmatogenous retinal detachment but can present in eyes with exudative -nonrhegmatogenous retinal detachment. Thus, when the configuration of the iris shows bowing in patients with retinal detachment, iris retraction syndrome should be considered and prompt pupil dilation should be carried out.Key words: iris retraction syndrome (IRS) -retinal detachment -ultrasound biomicroscopy (UBM), anterior-eye-segment-ultrasonography. Acta Ophthalmol. Scand. 1998: 76: 617-619 Copyright C Acta Ophthalmol Scand 1998. ISSN 1395-3907 I ris retraction syndrome (IRS) was originally described in the European literature over 40 years ago (Graham 1958) with only 3 reports of this condition appearing in American publications to date. IRS is defined by the triad of symptoms including backward bowing of the peripheral iris and rhegmatogenous retinal detachment (Hirschberg 1929;Graham 1958;Lindner 1936;Campbell 1984;Morinelli et al. 1996). We present two cases in which the configuration of the iris retraction appeared together with an exudative nonrhegmatogeous retinal detachment. We suspect that IRS is more common than believed and that more such cases may be detected as a result of greater awareness on the part of the physician who can then implement prompt and appropriate treatment to resolve the IRS. Case 1A 78-year-old man with a history of agerelated macular degeneration (AMD) was examined because of decreased vision in his right eye. The medical history and results of physical examination were noncontributory. Corrected vision was limited to counting fingers in the right eye and 1.0 (20/20) in the left eye. The intraocular pressure was 18 mmHg and the anterior segments were essentially normal in both eyes. Ophthalmoscopy revealed a subretinal haemorrhage in the posterior pole of the right eye. Fundus examination of the left eye showed macular drusen. Observation without treatment was recommended. Three months later, the condition of the left eye was unchanged; the visual acuity in the right eye had deteriorated to hand movements and the intraocular pressure dropped to 10 mmHg. Examination of the anterior segment of the right eye showed a clear cornea, an extremely deep ...