Characteristic of red eye related diseases of Han and Uygur population in Urumchi compared with Shanghai,China

INTRODUCTION

Compared with other systemic diseases, eye diseases are thought to be less associated with gender. Therefore, little ophthalmological research exists on gender as a factor in ocular disease. This may be due in part to the fact that there is little difference in eye shape between males and females,and to the relatively small number of ocular diseases showing sex-specific differences. However, studies have suggested that estrogen plays an important role in the etiology of certain eye diseases

and have shown that sex hormones are an important factor in controlling corneal thickness

. In addition, estrogen plays an important role in down-regulating inflammatory genes and thus inhibiting acute anterior uveitis

. In the present study, the age of onset of red-eye in females was significantly later than in males. Perhaps the relatively high estrogen levels in premenopausal women inhibit ocular inflammation, and after menopause this protective effect abates, equalizing red eye susceptibility in males and females. This may explain the later onset of red eye in females than males in the present study. Gender difference was also found in young patients,with higher incidence of red eye in males than females 1-18 years old. Therefore, clinical ophthalmologists also need to pay attention to red-eye conditions in children, especially boys. Matossian

indicated that the prevalence of dry eye increased from 14% in females aged 50 to 22% in those aged 80 and over, while this increase was not significant for males. Other research indicates that on average dry eye may be diagnosed at an earlier age in females than males,and identified female gender as a risk factor for dry eye

.This is consistent with our finding that in Urumchi red eye is related to conjunctival disease and dry eye in females, but conjunctival disease and trauma or surgery in males. A 2017 epidemiological study of dry eye by the Tear Film and Ocular Surface society noted a significant increase in the prevalence of dry eye every decade

. Therefore, we can further speculate that dry eye is an important factor influencing the varied incidence of red-eye-related diseases with age. This is in alignment with the increased proportion of dry eye with age in our sample of patients with red eye.

鱼类越冬密度主要根据越冬池冰下有效水量（指冰冻到最大厚度时冰下的实际水量）、有无补水条件、越冬池底质情况（淤泥、杂草多少）等来确定。在采取生物增氧措施和有机械增氧措施保证的前提下，越冬密度一般为：有补水条件的越冬池，按冰下有效水体，可放鱼0.4～0.5kg/m3水；无补水条件的越冬池，按冰下有效水体，可放鱼0.25kg/m3水。

SUBJECTS AND METHODS

The range of red-eye-related conditions included conjunctival disease, dry eye, corneal disease, conjunctival corneal disease,trauma or surgery, glaucoma, and other ocular diseases. Due to the very low prevalence of progressive pterygium, scleritis,and uveitis in in the Shanghai data, these were classified as‘others’. No significant difference in disease distribution wasfound between males and females (

=11.872,

=0.063).In both genders, the most frequent causes of red eye were conjunctival disease and dry eye. The above data are shown in Table 1, Figures 1 and 2.

Clinical Data Data were collected from continuous cases of red-eye patients admitted to the Ophthalmology Center of Xinhua Hospital Affiliated to Shanghai Jiao Tong University and the First Affiliated Hospital of Xinjiang Medical University between November 2018 and September 2019. Demographic and clinical data were analyzed and compared between the two hospitals.

Incidence of red eye and related disease distribution in different ethnic groups in Urumchi center Red eye cases at the ophthalmology clinic of Urumchi center included data from 314 Han people and 101 Uygur people, aged 39.87±22.47y and 43.72±20.18y, respectively (

=0.126).Significant differences were found in the age distribution of red eye incidence and the distribution of red-eye-related diseases between the two ethnic groups (

=8.903,

=0.031,and

=24.576,

=0.002 respectively). Conjunctival diseases accounted for a large proportion in the distribution of red-eyerelated diseases in both ethnic populations. The incidence of red eye in children (1-18 years old) was higher in the Han than the Uygur population. Trauma or surgery explained a higher proportion of red-eye in the Uygur patients than the Han patients. No significant differences were found in the types of conjunctival and corneal diseases causing red eye in the two ethnic groups (

=2.753,

=0.225, and

=5.992,

=0.068).Results can be seen in Table 3 and Figure 5.

Incidence of Red Eye in Different Sexes and the Distribution of Related Diseases in Shanghai Clinic Data were gathered from records of 125 males and 210 females aged 47.94±23.36 and 52.13±18.42, respectively (

=0.035) at the Shanghai Ophthalmology Clinic and included in the study. Of these, conjunctival diseases accounted for 39%, the majority(68%) of these being allergic conjunctivitis, followed by dry eye diseases accounting for 30%. Among cases of corneal disease, palpebral keratitis accounted for the largest proportion,at 47%. When cases were categorized by age a significant gender difference was found in the age of onset of red-eye(

=15.206,

=0.002). In children (aged 1 to 18y) the prevalence of red eye was 17% in males and only 4% in females.

Diagnostic criteria for conjunctivitis were as follows:inflammation or infection of the conjunctiva characterized by dilation of the conjunctival blood vessels, with conjunctival congestion and edema, with or without secretions. Ocular discharge type and symptoms were used to determine the cause of conjunctivitis. For example, purulent secretions are usually caused by bacterial conjunctivitis, while watery secretions are characteristic of viral conjunctivitis, and itching is also associated with allergic conjunctivitis

. The type of secretions or other clinical symptoms are not unique to one type of conjunctivitis. All other diagnoses of red-eye related diseases were differentiated by ophthalmologists with rich clinical diagnosis experience.

Statistical Methods In this study, SPSS26.0 software was used for statistical analysis of the data of each center. For the comparison of male and female ages, the independent

-test method was used. For other different groups of cases, we used the Chi-square test. Besides, we performed a binary Logistic regression analysis of risk factors for allergic conjunctivitis.All statistical thresholds were

＜0.05.

Red eye was defined as a general term to describe irritated or bloodshot eyes

. It was an identifiable marker of acute or chronic inflammation of the ocular surface, local or systemic inflammation. The main pathophysiological changes of red eye are the changes of corneal morphology due to potential inflammatory reaction on the eye surface, the influence of sub-basal plexus on the regeneration and coverage of corneal epithelium, and the effect of hormone or local mechanicalcompression on the formation of tear film. inflammatory mediators and hypersensitivity can lead to high permeability of tear film

. In the ophthalmology clinic, red eye is one of the most common symptoms of ocular discomfort. Red-eye patients usually seek urgent care, and their clearly apparentsymptoms may be the first indicators of local or systemic disease at an early stage. For ophthalmologists, it is important to identify the various causes of red eye so that appropriate treatments are prescribed. Therefore, understanding the epidemiological characteristics of red eye is very important for the treatment of related disease.

RESULTS

Diagnostic Disease Records of all patients presenting with ocular disease during the study period were collected. Eligible ocular conditions included infectious conjunctivitis, allergic conjunctivitis, trachoma, blepharitis, dry eye, progressive pterygium, other conjunctival diseases, infectious keratitis,palpebral keratitis, drug-derived epithelial lesions, other non-infectious keratitis, scleritis, glaucoma, uveitis, trauma,and other ocular diseases caused by eye surgery. Infectious conjunctivitis includes bacterial, fungal, and viral conjunctivitis as well as infectious conjunctivitis of indeterminate type.

Ethical Approval All research methods were approved by the committee of the medical ethics of Xinhua Hospital Affiliated to Medical College of Shanghai Jiao Tong University and were in accordance with the Helsinki declaration and its later amendments or comparable ethical standards (XHEC-D-2020-023). All subjects were explained the purpose, method, potential risks and signed an informed consent form.

Incidence of Red Eye in Different Genders and the Distribution of Related Diseases in Urumchi Center Data from 202 males (aged 37.98±23.11y) and 213 females (aged 43.50±20.53y;

=0.010) were gathered at the ophthalmology clinic of Xinjiang hospital, and included in the study.Conjunctival diseases accounted for the largest proportion of cases, at 42%. Among these, infectious conjunctivitis accounted for the largest proportion at 86%, and allergic conjunctivitis a relatively small 10%. In the category of corneal disease, non-infectious keratitis accounted for the largest proportion at 50%, followed by infectious keratitis,and corneal diseases caused by palpebral keratitis accounted for only 9%. Data were grouped according to the same age categories used for data at the Shanghai clinic, and a significant difference was again found in the age of onset of red eye between men and women (

=10.651,

=0.014). Male children(aged 1 to 18y) accounted for 21 percent of all cases and females in this age group accounted for 10 percent. Due to the relatively high prevalence of progressive pterygium, scleritis,and uveitis among the subjects in the Urumchi center, these were categorized separately and not grouped as “others”. A significant difference in disease distribution was found between males and females (

=24.969,

=0.002). In men, conjunctival diseases accounted for the largest proportion (38%), followed by trauma or surgery (19%). Conjunctival disease was also the most common cause of red-eye in women (45%), followed by dry eye and other causes (11%). Results are shown in Table 2,Figures 3 and 4.

Patient and Public Involvement By collecting the ophthalmic clinical outpatient information of the subjects, we screened out the patients with red-eye as the chief complaint and studied the specific etiology of red eye. None of the subjects were recruited for this study. The results of this study can be used to analyze the specific etiology of red eye patients and contribute to the prevention of red eye and recurrence.This study was not a randomized controlled study. It is an epidemiological study of red eye in ophthalmology.

Comparison of Corneal and Conjunctival Diseases in Shanghai and Urumchi Centers Data from both centers indicated that red eye was related to infectious and allergic conjunctivitis, other conjunctival diseases, palpebral, infectious and non-infectious keratitis, and drug-derived epithelial lesions. A comparative analysis of the disease composition ratio between the two centers showed significant differences in the proportions of conjunctival and corneal diseases(

=123.477,

＜0.001 and

=14.608,

=0.001). Specific data are shown in Table 4.

再有人找老崔，老崔就说，我反正不行了，我只能做缩头乌龟了。业主生气说，既然物业都撒手不管，我们也乱来了。说着就真的乱来了，也不管地上有没有固定的车牌号码，看见空当就停，先来先抢。也有人干脆将原先地上写着的别人的车牌号，改成了自己的车牌号。再有业主以购房合同相威胁，老崔就说，我不客气了，我要以牙还牙了，你们不是拿购房合同说事吗，我们也拿购房合同说事，反正购房合同上没有写保证停车的条款，你们告不倒我。

Results of Binary Logistic Regression Analysis of Allergic Conjunctivitis in Different Seasons and Different Genders in Shanghai Center Binary Logistic regression indicated that,spring, summer and autumn were all important risk factors for the occurrence of allergic conjunctivitis, compared with winter (

=0.042,

=0.020;

=0.007 respectively), with highest risk in spring. No significant difference in risk for allergic conjunctivitis was found between genders (

=0.657). Specific statistical results can be seen in Table 5.

根据6上105-2工作面支架工作阻力实测，r=12 834 kN，p0=5 563 kN，Δhi=600 mm，ΔhA=1 394 mm，计算得K=3 130 kN。

DISCUSSION

党的十九大报告指出，要推进能源生产和消费革命，构建清洁低碳、安全高效的能源体系，这是我国新一轮能源革命的核心目标，对电网企业转型升级、改革创新提出了新的要求。云南绿色能源产业发展前景广阔，未来几年，以水电为基础的云南能源产业发展步伐将不断加快，新的能源发展格局，将对电网企业的运营管理、供电服务等产生深刻影响。南方电网云南电网公司通过准确把握能源发展的变革趋势，深入落实做强做优云南绿色能源产业的部署要求，超前做好工作，以“优化主网、做强配网、升级农网”为主线，大力提高云南电网的技术装备水平，加快建设安全、可靠、绿色、高效的智能电网。

Red eye is a very common eye condition encountered in clinical examination by ophthalmologists. These patients usually have a good prognosis, but there are rare cases of severe symptoms and inflammation that can lead to serious visual impairment and life-threatening health risks.In clinical examination, common ocular diseases that lead to red eye include conjunctival disease, corneal disease, dry eye, blepharitis, pterygium, and glaucoma, which is common in the elderly

. Among the conjunctival diseases that cause red eye is bacterial, fungal, viral, and allergic conjunctivitis,the latter caused by allergens or seasonal changes

. Corneal diseases can also be categorized as infectious and noninfectious keratitis. It should also be noted that the incidence of dry eye is increasing due to the increasing frequency and time spent using video display terminals

. The proportion of red eye caused by dry eye is rising, while global climate change and the aggravation of environmental pollution have triggered a rise in the incidence of allergic eye diseases caused by allergens

. As one of the most inland cities in China, the oasis city Kashgar was located in the desert area of western China, with an elevation of more than 1200 meters. It is one of the driest cities on earth, with hot summers and cold winters

. A multicenter Chinese allergy study shows that the high incidence of allergic rhinitis in Urumqi in Xinjiang lasts longer than in other areas, from April to August

. Related studies have further proved that the incidence of dry eyes in desert and plateau areas was significantly higher than that in coastal and low-altitude areas

. Environmental risk factors for dry eye disease include strong light exposure, excessive ultraviolet radiation, dry climate, strong winds and dust

.In the inland areas of Xinjiang, the above environmental risk factors are very common, and dry eyes are one of the most important causes of red eyes

. Therefore, an understanding of the related diseases and characteristics of red eye is important to improve the accuracy of red eye diagnosis. To this end,we retrospectively analyzed the continuous case data of redeye patients in Urumchi and Shanghai ophthalmology clinics from the Western and Eastern regions of China, respectively,to determine the epidemiological characteristics of red eye,and provide a basis for the clinical diagnosis, treatment and research of red eye patients.

Conjunctivitis has been found to be the most common cause of red eye

, and may be infectious or non-infectious. Infectious conjunctivitis mainly includes bacterial, viral, and fungal forms,while non-infectious conjunctivitis is mainly the allergic form

.Dry eye is another important cause of red eye

and is characterized by insufficient tears or excessive tear evaporation,eye irritation, and visual impairment. Severe dry eye can lead to corneal ulcers and conjunctivitis

. Trauma and surgery were also important risk factors for red eye. In the present study,conjunctival disease and dry eye were the main causes of red eye in the Shanghai center. Conjunctival disease and trauma or surgery were the main causes of red eye in the Urumchi center.Previous evidence indicates that climate and air pollution levels are important risk factors for conjunctivitis and that females or people under 18 years of age are at high risk of conjunctivitis caused by air pollution

. Reducing air pollution is therefore an important measure to protect susceptible groups. In our study, the proportion of infectious conjunctivitis in the sample of red-eye patients in Western China represented by the Urumchi center was much higher than that in Eastern China represented by the Shanghai center.In our analysis, a possible explanation may be that air pollution is higher in Western than Eastern China due to dry climate and heavy sandstorms. Moreover, the local economic level is lower in Western than Eastern China, and public awareness of health care is relatively low, factors which may contribute to higher incidence of infectious conjunctivitis. In the Eastern location of Shanghai, however, the proportion of allergic conjunctivitis was higher than that of infectious conjunctivitis in the patients with red eye. Studies have shown that nitrogen oxides, sulfur dioxide and carbon monoxide in automobile exhausts are important allergy-related pollutants

. Shanghai is one of the busiest cities in China, with high levels of automobile exhaust pollution, and this may be one of the important reasons for the high incidence of allergic conjunctivitis in eastern China. In addition, our study showed that spring was an important risk factor for allergic conjunctivitis, consistent with other research categorizing allergic research as seasonal (with high incidence in spring) or perennial

. Although studies have shown that females have a higher incidence of conjunctivitis than males

,gender was not a risk factor for allergic conjunctivitis in our study.

However, there are some limitations to our study. First of all,further enlargement of the sample size is needed. In addition,only the composition ratio of red-eye-related diseases was studied, and the assistance of accurate diagnosis is only provided. Further studies are needed for its treatment and rehabilitation. Moreover, we need to strengthen the follow-up of the subjects in our further research, to observe the changes in the time direction.

秀容月明早听说过乔瞧，乔瞧是西大街人，从父亲那里学了一手好医术，倘若父亲不在家，就由她望闻问切，倒也救治不少病人。那绿裙少女叫越秀，跟乔瞧住一条街上，她们是最要好的朋友。

In conclusion, in our study, the onset of red eye occurred later in females than in males, and in children (1 to 18y) its incidence was higher in males than females. In the Eastern city as Shanghai, the most common eye diseases causing red eye were conjunctival disease and dry eye, and the incidence of infectious conjunctivitis was significantly lower than in the Western region as Urumchi. Red eye in males in Urumchi was mainly caused by conjunctival disease, trauma or surgery.In females, conjunctival disease and dry eye were the main causes. With age, the proportion of red eye caused by dry eye increased, but the proportion caused by conjunctival disease decreased significantly. Finally, spring, summer and autumn are high risk factors for allergic conjunctivitis compared with Winter. This epidemiological study summarizes and compares the distribution of red-eye-related diseases in the Urumchi and Shanghai regions of China, which can assist in guiding ophthalmologists in the diagnosis of red eye related diseases.Ophthalmologists in each region can accurately diagnose patients with red eye related symptoms according to the epidemiological characteristics of their region.

ACKNOWLEDGEMENTS

Authors’ contributions: Zhao H, Shao Y and Wu SN analyzed the data and draft the manuscript; Zhang Q and Zhao C assisted with data interpretation and figure composing;Chen XY collected the data; Zhao H and Fu J conceived,designed and directed the study, and final revised and approved the manuscript.

Foundation: Supported in part by the Medicine & Engineering Collaboration Research Fund of Shanghai Jiao Tong University(No.ZH2018QNB27).

Conflicts of Interest: Zhao H, None; Shao Y, None; Wu SN,None; Tang LY, None; Zhang Q, None; Zhao C, None; Chen XY, None; Fu J, None.

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