Frequency and Characteristics of Ocular Trauma in a Tertiary Care Hospital in Lodhran

Results: There were 393 patients included in this study. Mean age of patients was 28.97 ± 12.59 years. There were 198 (50.4%) closed globe and 195 (49.6%) open globe injuries. In 53 (13.5%) cases injury was caused by metal object. In 132 (33.6%) cases injury was classified as contusion. In 146 (37.2%) cases cornea was involved. There were 95 (24.2%) cases that occurred in home. In 156 (39.7%) cases presenting visual acuity was less than 6/60. There were 272 (69.2%) males and 121 (30.8%) females. There were 342 (87.0%) patients who presented within 1 day after trauma. In 122 (31.0%) cases there was prolapse of ocular contents.

ye trauma is cause of ocular morbidity that can be prevented 1 . It is one of the leading causes of blindness [2][3][4] . Every year about 1.6 million people become blind due to ocular trauma 5 . Eye injury results in a large number of hospital visits 6 . Ocular trauma results in significant physical, psychological and economical loses 7 . Eye injury results in functional disability, cosmetic blemish, economical loss and psychological distress. Impact of eye injury is long lasting and disturbing for the patient and the whole family. Impact of ocular injury and vision loss is greatest in magnitude compared to the loss of any other sensory organ of the body. Eye injuries can occur in a variety of settings like during playing, in home, at work or as a result of assault or accident 8 . Due to their anatomical location and consistency eyes are prone to get hurt event by trivial trauma. Ocular trauma can be profession specific as persons engaged in certain professions are likely to get hurt by certain objects 9 . Every year around 55 million people get injuries in their eyes. One out of every twenty patients coming for eye examination by an ophthalmologist is a sufferer of eye injury 10 . Trauma to eye can lead to immediate damage or it can lead to establishment of inflammation and infection afterwards. Sequel of ocular trauma can cause significant ocular morbidity even after months or years 11 . Self medication by the patients or improper management by the quacks is another contributing factor in morbidity related to ocular trauma. Ocular trauma is often preventable and proper management of ocular injuries can significantly lessen the burden of blindness 12 .
Data about ocular trauma is limited in developing countries in terms of aetiology, setting, extent of injury, pattern of injury and management strategies. As depending on occupation and socio-demographic factors, nature and characteristics of ocular injury differ from region to region, so we want to know the frequency and characteristics of ocular trauma in Lodhran. Good knowledge of aetiology of trauma, patterns and characteristics of trauma and at-risk population is needed to device strategies for prevention and management of this disabling condition. Proper resource allocation for the prevention and treatment of ocular injuries can be planned according to burden of ocular injuries in the region.

MATERIAL AND METHODS
This cross-sectional study was conducted at Shahida Islam Teaching Hospital affiliated with Shahida Islam Medical College, Lodhran from December 2016 to September 2018. Sample size was calculated according to the following formula: S=Z 2 p(1-p)/M 2 S is sample size Z is Z score its value is 1.96 P is population proportion assumed to be 50% or 0.5 M is margin of error that is taken 5% or 0.05 S = (1.96) 2 (0.5)(1-0.5)/0.05 = 384.16 = 384 All ocular trauma patients presenting in the out patients department and emergency department who required hospital admission were included in the study. All patients were told about the purpose of the study and informed consent was taken.
Demographic profile like age and gender of all patients were recorded. History regarding aetiology of injury, eye structures involved, place where injury occurred and pattern of injury were recorded.
Ocular injuries were graded according to Birmingham eye trauma terminology into two types namely closed globe and open globe injuries. Closed globe injuries were further divided into contusion and lamellar laceration. Open globe injuries were divided into laceration and rupture. Mechanism of rupture was trauma with blunt object while trauma with sharp object resulted in laceration. Laceration was further divided into penetrating, perforating and presence of intraocular foreign body 13 . Periorbital and adnexa injuries were recorded.
Record was taken of the time elapsed between injury and presentation to hospital. Presenting visual acuity was recorded with Snellen's chart. Detailed ocular examination was performed with the help of slit lamp biomicroscopy. B-scan and X-ray imaging were performed when required.
All the information was gathered with the help of specially designed proforma. Statistical analysis was performed with SPSS version 23. Mean and standard deviation was calculated for age. Frequencies and percentages were calculated for gender, aetiology of injury, type of injury, structures involved, place of injury, presence of hyphema, status of lens, presence of vitreous haemorrhage, status of retina, optic nerve status, presenting visual acuity, time lapse between injury and presentation to hospital and prolapse of intraocular contents.

DISCUSSION
Ocular trauma is one of the major causes of preventable blindness and visual impairment 14 . Three hundred and ninety-three patients with ocular trauma were included in this study. Mean age of patients was 28.97 ± 12.59 years. Results of our study are similar with the findings of study done by Dhulikhel that showed the most vulnerable age group was 21-30 years 15 . Study of Godar and co-authors also recognized the most vulnerable age group for ocular trauma was between 21 to 29 years. Ocular trauma in young age group may be due to their increased risktaking behaviour and active life style. Morbidity resulted thereof has great impact in terms of economical burden and quality of life.
There were 272 (69.2%) males and 121 (30.8%) females included in our study. Work performed by Sengupta and co-authors also showed the preponderance of male patients affected by ocular trauma 16 . Increase ocular trauma in male patients may be due to their increase outdoor activity and engagement in certain professions 17 .
In our study there were 198 (50.4%) closed globe injuries and 195 (49.6%) open globe injuries. Among closed globe injuries, contusion was the most common cause. Among open globe injuries, globe rupture was the most common cause. Our results are similar to findings of other studies. In our study most common cause of injury was metal object and cornea was involved in majority of cases. Our results are in accordance with the result of other studies 18 .
In our study most common place of injury was home. Our results are in contrast with the results of other studies 19 where most of ocular trauma occurred at work place and during road traffic accidents. Our results are in accord with that of the study conducted by Shaeri and co-authors 20 . Due to inadequate adoption of safety measures during common house hold activities may be reason for majority of ocular trauma at home. Most of the trauma among women and children occur at home. It is irony that home environment that is considered the safest accounted for majority of ocular trauma. Adoption of safety measures at home while doing house hold activities is as much needed as during outdoor activities.
In our study time to presentation to hospital was within one day in 342 (87.0%) cases, within 7 day in 41 (10.4%) cases and after 1 week in 10 (2.5%) cases. Our results are comparable to that of Godar and coauthors 14 .

Pakistan Journal of Ophthalmology
In our study presenting visual acuity was less than 6/60 in 156 (39.7%) while in another study conducted by Sengupta and co-authors majority of patients presented with visual acuity less than 3/60 16 . This is in contrast with the result of study conducted by Iqbal and co-authors 19 . In their study majority of patients presented with good visual acuity. This difference in presenting visual acuity may be due to severity of ocular trauma. In our study we included patients who required hospital admission. Patients with minor ocular trauma were not included in our study.
Among the limitations of our study is the small sample size. This study may not be true representative of population as patients from high socioeconomic strata were unlikely to come to public hospital. Patients who needed hospital admission were included in our study. This is another limitation. Patients with minor injuries who did not need hospital admission or did not come to hospital were not included in the study.
Nevertheless, our study underscores the frequency and patterns of ocular trauma in particular locality. It will help establish preventive and management strategies to cope with ocular trauma. Future research is needed to study the impact of health education on adaption of safety measures in preventing ocular trauma. Moreover, it will be important to study the anatomical and physiological outcomes of ocular trauma management strategies.

CONCLUSION
Ocular trauma occurred more commonly in males. Ocular trauma was blunt and occurred in home setting in most of the times. The aetiological agent in most of the eye injuries was metal and wood. Ocular injuries resulted in substantial visual loss at the time of presentation.