{'fraction_non_alphanumeric': 0.054108723135271805, 'fraction_numerical': 0.04652338811630847, 'mean_word_length': 4.603399433427762, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 6, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The five‐year incidence of open globe eye injuries at Odense University Hospital, Denmark

Editor, W e made a retrospective survey of patients with open globe eye injuries presenting at the Department of Ophthalmology, Odense University Hospital, Denmark, in the years 2003–2007. In 2003–2004, the department treated all open globe injuries from Funen County, Denmark (population 476 580). Thereafter, open globe eye injuries occurring on weekends were also referred from the rest of the region of southern Denmark (total population 1 185 851). Patients were identified from records in the patient administrative system ‘Fyn Amts Patient administrative System’. We included all patients with a relevant International Classification Disease 10 discharge code (S05.2–S05.6) (WHO ICD-10 Diagnosis 2010) as well as patients with a relevant surgical operation code (KCGF 00-99, KCDB 00-99, KCDC 00-50, or KCDW) (Nordic Medico-Statistical Committee 2011). The type of injury was categorized according to ‘Birmingham Eye Trauma Terminology System’ (BETT) (Kuhn et al. 2002) as rupture (full-thickness wound of the eyeball caused by a blunt object), penetration (wound caused by sharp object with only an entrance wound), perforation (wound caused by sharp object with both entrance and exit wounds) or intraocular foreign body (IOFB). According to the classification by the Ocular Trauma Classification Group (Pieramici et al. 1997), wound location was categorized into 3 zones, defined according to the most posterior part of the full-thickness wound. Zone 1: including the cornea and limbus, zone 2: the anterior 5 mm of the sclera and zone 3: posterior to zone 2. The surveywasmade according to the Helsinki Declaration and approved by The Danish Data Protection Agency. The crude incidence of open globe eye injuries was 3.8 per 100 000 personyears. Male:female ratio was 3.4:1. The median age was 34 years (range 1–85 years) and 66 years (range 4–96 years) for men and women, respectively. Penetration was the most common type of injury (58%) followed by rupture (28%) (Fig. 1). For women, the injury was most likely to be caused by a rupture (63%), and in men, the most common type of injury was penetration (65%). IOFB were only found in men (14% of all men). The follow-up period varied from 2 days to 4.8 years (median 57 days). Visual acuity (VA) was measured at baseline and at last visit and categorized into four groups (no light perception [NLP], >NLP-0.1, >0.1–0.5, and >0.5). We found that 50% had a final VA of >0.5, while 13% had NLP at last visit. VA improved in 40%, declined in 10% and remained stable in the remaining patients. None of the patients with NLP at first visit improved, and only two of the patients with a visual acuity at baseline of more than 0.5 had a decline in visual acuity at final visit. The percentage of patients with wounds in zones 1–3 was 46%, 39% and 16%, respectively. At the final visit, the rate of patients with VA of >0.5 for these categories was 62%, 42% and 0%, respectively. With reference to BETT classification, corresponding rates were 9% for rupture, 60% for penetration and 61% for IOFB. BETT was examined as a predictor (defined by VA >0.5 at last visit). In an ageand sex-adjusted logistic regression model (with rupture used as reference), odds ratio for a favourable outcome was 12.2 (95% confidence interval [CI] 2.8–53.5) and 15.0 (95% CI 2.4–94.1) for penetration and IOFB, respectively. No other risk factors (time of the day, day of the week, workrelated trauma, trauma caused by violence, alcohol involved) were associated with outcome. In conclusion, the incidence of open globe eye injuries was comparable to a previous observation from the western part of Sweden (3.3 per 100 000 person-years) (Byhr 1994). A higher risk was found in men who were in general affected at an earlier age than women. Ruptures and posterior location of the wound were associated with an unfavourable outcome.