Diplopia is a common complaint with two subtypes: monocular and binocular in the emergency department (ED) and outpatient clinic. Monocular diplopia is typically associated with ocular abnormalities and refractive errors, whereas binocular diplopia may indicate the presence of an underlying life-threatening cause. To emphasize the importance of identifying underlying neurologic disease in individuals experiencing diplopia. Over a 3-year period, patients admitted to the ED and neurology outpatient clinic with diplopia were retrospectively analyzed. ‘Secondary diplopia’ was defined when an organic cause was found. ‘Isolated diplopia’ was identified as the absence of additional signs and symptoms other than diplopia. All patients were examined for risk factors and investigated for an etiology. Out of the 222 (male: 138) patients, 213 (96%) had binocular diplopia. Secondary diplopia was observed in 113 (53%) patients and 82 (38.4%) had isolated diplopia. One hundred twenty-five (58.6%) patients had at least one sign or symptom associated with diplopia. The incidence of diabetes was significantly higher in secondary diplopia. Ninety-three (43.6%) patients had ocular cranial nerve palsy, most commonly in the 6th cranial nerve. Diplopia with at least one associated sign or symptom and ocular cranial nerve involvement was statistically significant for secondary diplopia. In cases of acute diplopia the presence of at least one additional associated sign or symptom was significantly higher. It is very important to investigate an underlying neurologic etiology that may be life-threatening because secondary diplopia was detected in half of the patients with diplopia in the present study.

复视是急诊科 (ED) 和门诊的常见病症，有两种亚型：单眼复视和双眼复视。单眼复视通常与眼部异常和屈光不正相关，而双眼复视可能表明存在潜在的危及生命的原因。强调识别复视个体潜在神经系统疾病的重要性。对三年来因复视而入住急诊科和神经科门诊的患者进行了回顾性分析。当发现器质性原因时，定义为“继发性复视”。“孤立性复视”被确定为除复视之外不存在其他体征和症状。所有患者均接受危险因素检查并调查病因。在 222 名患者（男性：138 名）中，213 名（96%）患有双眼复视。113 名（53%）患者出现继发性复视，其中 82 名（38.4%）患者出现孤立性复视。一百二十五名 (58.6%) 患者至少有一种与复视相关的体征或症状。继发性复视的糖尿病发病率明显较高。93 名 (43.6%) 患者患有眼颅神经麻痹，最常见于第六颅神经。具有至少一种相关体征或症状且眼颅神经受累的复视对于继发性复视具有统计学意义。在急性复视的情况下，至少一种额外的相关体征或症状的存在明显更高。研究可能危及生命的潜在神经病学病因非常重要，因为在本研究中，一半的复视患者检测到继发性复视。