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With the increasing popularity of laser refractive surgery, eye banks should increase their awareness and refine screening techniques to rule out refractive surgery in the donor corneas. The long-term follow-up of those patients will reveal if surgical success was compromised by prior refractive surgery.

Aims/background-Laser scanning tomography provides an assessment of three dimensional optic disc topography. For the clinical purpose of follow up of glaucoma patients, the repeatability of the various measured variables is essential. In the present study, the reproducibility of morphometric variables calculated by the topographic scanning system, TopSS (Laser Diagnostic Technology, San Diego, CA) was investigated. Methods-Two independent measurements (30 minutes apart) each consisting of three complete images of the optic disc were performed on 16 eyes of 16 glaucoma patients using a TopSS. The instrument calculates 14 morphometric variables for the characterisation of the optic disc. Results-From the two tailed paired tests, all variables were seen to have good reproducibility. However, correlation and regression analyses showed that only the three variables, volume below, half depth area, and average cup depth, are acceptably reproducible. Conclusion-The TopSS provides three variables which describe the physiological shape of the optic disc that have high reproducibility. These three variables might be useful for following the progression of optic disc changes in glaucoma patients.

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 ...

LettersBilateral corneal contusion and angle recession caused by an airbag EDrrOR,-Airbags have been installed as standard equipment on most new cars in order to enhance automobile safety. Several reports of airbag associated injuries have recently appeared. 1-7We describe herein a case of severe ocular trauma caused by an airbag to a front seat passenger.

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