|Year : 2017 | Volume
| Issue : 2 | Page : 50-54
Sonographic Findings in Posterior Segment of the Eye in Sudanese Adult Patients Examined with Cataract
Awadia Gareeballah1, Moawia Bushra Gameraddin2, Gadia Ali3, Mahmoud S Babiker2, Maisa Elzakil3
1 Department of Diagnostic Radiologic Technology, Faculty of Applied Medical Sciences, Taibah University, Al-madinah Al-Munawarah, King Saudi Arabia
2 Department of Diagnostic Radiologic Technology, Faculty of Applied Sciences, Taibah University, Al-Madinah Al-Munawarah, Kingdom of Saudi Arabia
3 Department of Diagnostic Radiology, Faculty of Radiological Sciences and Medical Imaging, Alzaiem Al-Azhari University, Khartoum, Sudan
|Date of Web Publication||26-Feb-2018|
Moawia Bushra Gameraddin
Department of Diagnostic Radiologic Technology, Faculty of Applied Sciences, Taibah University, Al-Madinah Al-Munawarah
Kingdom of Saudi Arabia
Background: cataract is remaining a health problem worldwide and is a leading cause of blindness. The majority of cases were reported in the developing countries. Ocular sonography is an important imaging method to evaluate abnormalities of the posterior segment of eyes. Objective: The objective of this study was to determine the ocular posterior segment abnormalities in Sudanese adult patients using ultrasound and to describe the different types of cataract and their association with age and gender. Materials and Methods: This was a single-center, cross-sectional study conducted in Al Walidain Eye Hospital in Khartoum State (Omdurman) from February to July 2017. Data collection sheet was designed to include a detailed history and demographic data. An ultrasound machine MEDA ultrasonic A/B scanner for ophthalmology Model ODM-2100S with probe 10 MHz was used to investigate the participants. Patients with known lesions in posterior segment and those who had a previous history of ocular surgery were removed from the study. Chi-square test was used to assess the relationship between qualitative variables. Results: A total of 102 known preoperative cases of cataracts were evaluated in either gender; 60 females and 42 males. The mean age was 61 ± 13.87 years. The incidence of cataract was more frequent in the age groups of 61–70 and 51–60 years than other age groups. The prevalence of significant types of cataracts was as follows: nuclear cataract 61.7%, secondary 21.57%, traumatic 12.75%, and posterior subcapsular 3.92%. Sonographic findings revealed a posterior vitreous detachment (PVD) of 19.2% of the cases, vitreous hemorrhage of 0.98%, and complicated PVD of 1.96%. All types of cataracts were strongly associated with age (P < 0.001). Nuclear and secondary cataracts were more common in females (P = 0.04). Conclusion: Abnormalities of posterior segment are indicative features that should be evaluated by ultrasound before ocular surgery. Age and gender were significant factors for all types of cataracts. Ocular sonography is essential before cataract surgery.
Keywords: Age, gender, nuclear, ocular sonography, cataract, posterior segment
|How to cite this article:|
Gareeballah A, Gameraddin MB, Ali G, Babiker MS, Elzakil M. Sonographic Findings in Posterior Segment of the Eye in Sudanese Adult Patients Examined with Cataract. Sudanese J Ophthalmol 2017;9:50-4
|How to cite this URL:|
Gareeballah A, Gameraddin MB, Ali G, Babiker MS, Elzakil M. Sonographic Findings in Posterior Segment of the Eye in Sudanese Adult Patients Examined with Cataract. Sudanese J Ophthalmol [serial online] 2017 [cited 2018 Mar 21];9:50-4. Available from: http://www.sjopthal.net/text.asp?2017/9/2/50/226145
| Introduction|| |
Cataract represents an important cause of blindness in developing countries such as Sudan and India, and many of these cases had advanced cataracts and attended lately to the clinical centers.
Cataract blindness is considered to be One of the major t public health challenges of the 21st century. Cataract is considered the main cause of blindness in the world, accounting for approximately half (47.8%) of all cases of blindness. In a systematic review of population-based studies, Cataract was the principal cause of blindness in sub-Saharan Africa. It has been accounted that ninety percent of visually impaired people live in developing countries. The blindness The blindness in these countries causes disability and increased mortality, resulting in severe economic and social consequences. In 2002, the WHO reported that blindness involves 37 million people worldwide. This number is predicted to reach 76 million by the year 2020 if efforts are not obtained to deal with this serious health problem. In Sudan, the incidence of cataract blindness in Makah Eye complex hospital was approximately 677.43 patients per year in 2011–2012.
High-resolution sonography is one of the most important techniques used for evaluation orbit. Visualization of orbit structures has become a routine part of the ocular examination. In particular, the vitreous body and lens are well visualized along with the other structures in orbit. This is attributed to the cystic nature of the eye and its superficial location that allow high-frequency transducer to demonstrate normal anatomy and pathology. Nowadays, ocular sonography has become an important diagnostic imaging method that has increased the ability to detect and differentiate many ocular and orbital diseases. It is safe, rapid, and nonionizing that enables it to provide valuable diagnostic information of various ophthalmic diseases not obtainable by any other imaging methods. However, ultrasound is capable of detecting various pathologies preoperatively; this enables the ophthalmologist and surgeon to plan surgery and take measures to combat various predictable complications.,
In previous studies, there were statistical inconsistencies regarding the prevalence of diseases of the posterior segment of the eye in cataract patients. Significant difference was observed regarding findings associated with cataract across different communities. Shen et al. reported the prevalence of vitreous detachment (VD) in Chinese to be 2.7% in a large cohort study. In an epidemiological study performed by Sawsan and Samira in 2001 at Khartoum, the incidence of vitreous hemorrhage (VH) was reported to be 51.7 due to diabetes mellitus. However, to our knowledge, only rare studies demonstrated the sonographic findings which associate with cataracts.
The present study aims to characterize abnormalities associated with cataracts using ultrasonography in Sudanese adults attending AL Walden eye Hospital (Omdurman) and to find a correlation between age and gender with the sonographic findings. However, the present study will highlight the importance of ocular sonographic evaluation in preoperative adult cataract patients. This is useful for ophthalmologists to establish a strategy for diagnosis and treatment for cataract patients and patient counseling.
| Materials and Methods|| |
This was a single-center, prospective cross-sectional study for assessment of cataract by ultrasonography and to detect the posterior segment abnormalities of eyes in cataract patients using ultrasound in such preoperative cases. The study was conducted from February to July 2017 in Al Walidain Eye Hospital (Omdurman, Sudan). A total of 102 Sudanese adult preoperative cataract patients (males and females) participated in the study. Exclusion criteria included patients with a history of posterior segment abnormality and those who had a previous history of ocular surgery. Children were also excluded from the study. Data collection sheet was designed to collect demographic data (age, previous surgery, etc.) Clinical history was written from patient's records. The study was approved by the ethical committee of Al-Rebate National University. Informed written consent was obtained from every patient to participate in the study.
The patients were scanned using MEDA ultrasonic A/B scanner for ophthalmology Model ODM-2100S with probe of 10 MHz. The method used is directly interviewing the patients when they present to the ultrasound department for ocular ultrasonography. The patient was sitting, flexed his neck, and slightly rotated his head to the opposite side, to prevent gel pouring. The ultrasonic linear probe of 7.5–10 MHz with small footprint transducers was selected and placed over the globe of the eye with a closed lid after application of the gel. The anteroposterior, longitudinal, and transverse views of B-scan along with A-scan were taken. Images were interpreted by an expert sonologist and ophthalmologist.
The data collected during the study were stored in a compact disk in a personal computer. The statistical program, SPSS Inc. Version 16.0. Chicago, USA, was utilized to interpret the data. Data were presented as percentage and frequency. Chi-square test was used to evaluate the association between age and gender with sonographic findings of the posterior segment of the eye. P < 0.05 was considered statistically significant.
| Results|| |
A total of 102 patients with cataract were examined. The mean age was 61 ± 13.87 years; 60 females and 42 males [Figure 1]. The age was categorized into six groups [Table 1]. It was observed that most of the patients were in the age groups of 61–70 years and 51–60 years. Of this total number of patients, 68.6% had no previous history, 10.8% had a history of trauma, 9.8% had diabetes mellitus, and 6.9% had hypertension [Table 2]. Cataracts had been categorized using morphological and etiological classifications such as nuclear and subcapsular cataracts (morphology) and secondary and traumatic cataracts (etiology) as shown in [Table 3].
[Table 4] summarizes the ultrasonographic ocular examinations; it revealed that 77.5% of the patients did not present with any abnormalities in the eye contents, 19.6% had posterior VD (PVD), 0.98% had VD and edema, 0.98% had VH, and 0.98% had VD and staphyloma. Cataracts in all patients appeared as an ovoid echogenic mass on sonography.
|Table 4: Frequency distribution of sonographic findings associated with cataracts|
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It was observed that gender is a significant factor influencing the incidence of cataracts (P = 0.04). Nuclear and secondary cataracts were more common in females than males [Table 4]. Age is a significant factor affecting the incidence of various types of cataracts (P = 0.001). The age groups 16–70 years and 51–60 years had the high frequency of cataract [Table 5]. [Table 6] shows distribution of types of cataract and age of participants. A statistically significant correlation existed between the types of cataracts and gender (P = 0.04). [Figure 2] and [Figure 3] were ocular sonograms demonstrating cataract with vitreous changes.
|Figure 2: Sonogram of the right eye of a 70-year-old female demonstrating cataract with normal posterior segment|
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|Figure 3: Sonogram of a 52-year-old male demonstrating cataract with vitreous changes|
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| Discussion|| |
Ultrasonography has greatly advanced in the last 30 years; it has enabled us to study the disorders of the posterior segment of the eye even through opaque media such as dense cataract. It can detect lesions in the anterior segment and most commonly used to assess the abnormalities in the posterior segment of the eye. Ultrasonographic ocular evaluation is often used in cataract patients performed by the sonographers and ophthalmologists in Walidain Eye Hospital and is routinely used in these cases.
The sonographic ocular investigations in this study demonstrated that PVD was the most common finding (19.6%). This finding agrees with previous literature, particularly reports related to the prevalence of the various abnormalities assessed with ultrasound. According to Corrêa et al., PVD was the most common finding (26.1%), which is consistent with the current finding. Carrero  reported the prevalence of PVD to be 26.1%, which is close to our finding. It was contradictory to the finding of Mendes et al., who studied sonographic findings in patients with cataract and reported vitreous opacities to be the most common abnormality, 12.1%. PVD is attributed to fluid in the vitreous cavity which passes through holes or tears directly in the retina and separates the retina from the underlying pigmented retinal epithelium. Regarding VH, the incidence was 0.98% in this study. This finding agreed with that of Manzoor and Khalida who reported VH to be 1.91% in nontraumatic cataract patients. A previous study reported that VH was present in 2.5% of the cases, which is closer to our finding. However, VH was less frequent, and it was not a common abnormality in cataract patients.
Cataracts were categorized using morphological and etiological classifications. It was observed that all types of cataracts increased with advancing age. The study revealed that nuclear cataract was more frequent than other types of cataracts. This finding was consistent with several published studies. Congdon et al. studied the prevalence of different types of cataracts in an African population and reported that the prevalence of nuclear cataract was more common than other types (15.6%). This result was closer to our finding. It was observed that nuclear cataract was the most common in females. It was observed that secondary cataract is the second frequent type follows nuclear cataract. Similar to this result, Eballé et al. studied the epidemiology of secondary cataract and reported that the incidence was lower than that reported in previous studies. The prevalence of cataract types was significantly different from region to region according to metabolic disorders, age, and ethnic diversity.
The results of the present study demonstrated that 36.4% and 26.5% of the patients presented in the age groups of 61–70 and 51–60 years, respectively. It was observed that age was statistically correlated with the type of cataracts (P = 0.001). This finding is similar to other published studies. Haug and Bhisitkul studied “risk factors for retinal detachment following cataract surgery” and reported that younger age is associated with higher risk of retinal detachment. These findings supported that age is an important risk factor for all types of eye cataracts. In this study, diabetes mellitus and hypertension constituted approximately 20% of the presented cases. Both diabetes mellitus and hypertension were regarded risk factors for cataracts. Richter et al. studied the risk factors of various types of cataracts and reported that older age, history of diabetes, and higher systolic blood pressure were risk factors for lens opacities. This supported the fact that age, diabetes mellitus, and hypertension were independent risk factors for cataracts.
The current study found that gender is another factor associated with types of cataracts in Sudanese patients. It was observed that females were significantly more frequent to nuclear and secondary cataracts than males (P = 0.04). This finding is consistent with published studies. Richter et al. evaluated the risk factors of various types of cataracts and reported that female gender is one of the independent risk factors for mixed lens opacities. Olafsdottir et al. studied the prevalence of cataract with and without diabetes mellitus and reported that nuclear cataract is more frequent in women. These findings supported our finding that gender is a significant risk factor for nuclear and secondary cataracts.
Limitation of the study
The study faced some limitations. The sample size was not large enough and there were no available referent studies demonstrating the prevalence and sonographic findings of posterior segment of the eye associated with cataract in Sudanese adults. Further studies with suitable sample size would be recommended to confirm the initial results.
| Conclusion|| |
Abnormalities of the posterior segment are important ocular disorders that should be evaluated before ocular surgery. Age and gender were significant risk factors for all types of cataracts. Ocular sonographic evaluation is an important presurgical step in patients with cataracts or other opacities. Most importantly, the ultrasound also provided useful information for determining ocular surgery since the posterior segment disorders had been identified.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3]
[Table 1], [Table 2], [Table 3], [Table 4], [Table 5], [Table 6]