An unusual cause of visual loss: Subfoveal, motile angiostrongyliasis

This is a short report describing the clinical presentation, investigations, treatment and outcome of a patient living in the Jamaican countryside who was diagnosed with a live, motile subfoveal helminth identified as Angiostrongylus cantonensis on optical coherence tomography at the University Hospital of the West Indies Eye Clinic. This is the second documented case in Jamaica. Early recognition of angiostrongyliasis is important as it may manifest as eosinophilic meningitis which can be fatal without prompt treatment.

Knowledge, beliefs and practices regarding sickle cell eye disease of patients at the sickle cell unit, Jamaica

Introduction

Sickle cell disease can result in visually threatening eye disease (proliferative sickle cell retinopathy). This can be prevented with timely eye screening. It is important for patients to understand their role. Our research is to determine the knowledge, beliefs and practices (KBP) regarding eye disease of Sickle Cell patients and the impact of genotype, demographic and socio-economic status.

Methods

Cross-sectional study at the Sickle Cell Unit, Jamaica during May 2016. Consecutive non-pregnant adults (>18 years of age) attendees, who were not acutely unwell, were invited to participate. A 26-item single interviewer administered questionnaire was used to obtain socio-demographic data, highest level of education completed, employment status, sickle cell genotype, if known, frequency of clinic attendance and patients' knowledge, beliefs and practices. Ten of these were yes/no questions, whereas eight required that they choose correct answers from four choices.

Results

One hundred subjects were recruited, 72% had homozygous SS disease. Their ages ranged from 18-63 years (mean 34.1 years, SD11.3). Fifty six percent were female. Most (75%) had achieved at least secondary education. The majority (62%) were unemployed. The mean belief score was 3.6/6(60%) and the mean knowledge and practice scores were 3.3/7(47%) and 2.2/5(44%) respectively. Milder genotypes had higher knowledge scores vs the more severe genotypes (4.0 vs 3.2, P=0.013). Only 28% had regular eye examinations; less than 50% had seen an ophthalmologist in the past year. Practice scores were higher in employed than in unemployed patients (2.6 vs 1.9, (P=0.04)). Employed patients were more likely than the unemployed to see their eye doctor for regular eye “examinations” (42.1% vs 19.4%, χ2=6.0, P=0.02). The practice and knowledge scores correlated (r²=0.363, P<0.001) and belief score (r²=0.304, P =0.002), except where 98% believed they should see an ophthalmologist annually, but only 42% did, and 21% had never.

Conclusion

Knowledge scores were fair, however, the practice was not always in keeping with knowledge.

Ophthalmomyiasis externa due to sheep nasal botfly in rural Jamaica

We present the case of a young male patient who presented with pain, redness and foreign body sensation in his left eye. There was no associated decrease in vision. Three live larvae were removed from his left conjunctival sac and sent to the laboratory for identification. The patient was treated symptomatically and his symptoms were mostly resolved by the following day. The larvae were later identified as the first instar of the sheep nasal botfly. Poor sanitation and exposure to livestock were among the identified risk factors in this case. Physicians must have this as a differential diagnosis for conjunctivitis in patients with risk factors. This is the first reported case of ophthalmomyiasis from Jamaica.

Knowledge, Beliefs and Practices of Patients with Diabetic Retinopathy at the University Hospital of the West Indies, Jamaica

To determine the knowledge, beliefs and practices of patients with diabetic retinopathy attending the Retina Eye Clinic at the University Hospital of the West Indies. A prospective study was done using a questionnaire with a sample population of 150 patients. The questions included their knowledge about the frequency of their eye examination, the relevance of exercise and a healthy diet, the role of the ophthalmologist and their views on the importance of compliance with medications for diabetes and hypertension. One hundred and fifty patients were recruited. Sixty six percent (99/150) were females and 34 % (51/150) males. The ages ranged from 29 to 83 years (mean ± SD, 56.1 ± 10.3) years. Type II diabetes was more common; 63 and 79 % of females and males respectively. A minority (19.8 %) obtained tertiary education. The mean % knowledge scores were 86 ± 14 for males and 82.8 ± 16.4 for females (p = 0.260). Prior to attending the retina clinic, 50 % were unaware of the need for annual eye examinations. Compliance with medication, exercise and a special diet was seen in 73, 40.3 and 49.7 % respectively. Current knowledge scores were good. However, knowledge about the timing and frequency of eye examinations prior to attending the retina clinic was inadequate. Correct knowledge and beliefs did not correspond to a high level of compliant practices.

Computer vision syndrome and ergonomic practices among undergraduate university students

AIM

To determine the prevalence of computer vision syndrome (CVS) and ergonomic practices among students in the Faculty of Medical Sciences at The University of the West Indies (UWI), Jamaica.

METHOD

A cross-sectional study was done with a self-administered questionnaire.

RESULTS

Four hundred and nine students participated; 78% were females. The mean age was 21.6 years. Neck pain (75.1%), eye strain (67%), shoulder pain (65.5%) and eye burn (61.9%) were the most common CVS symptoms. Dry eyes (26.2%), double vision (28.9%) and blurred vision (51.6%) were the least commonly experienced symptoms. Eye burning (P = .001), eye strain (P = .041) and neck pain (P = .023) were significantly related to level of viewing. Moderate eye burning (55.1%) and double vision (56%) occurred in those who used handheld devices (P = .001 and .007, respectively). Moderate blurred vision was reported in 52% who looked down at the device compared with 14.8% who held it at an angle. Severe eye strain occurred in 63% of those who looked down at a device compared with 21% who kept the device at eye level. Shoulder pain was not related to pattern of use.

CONCLUSION

Ocular symptoms and neck pain were less likely if the device was held just below eye level. There is a high prevalence of Symptoms of CVS amongst university students which could be reduced, in particular neck pain and eye strain and burning, with improved ergonomic practices.

Chikungunya in the Caribbean: An Epidemic in the Making

Chikungunya is a mosquito-borne virus that has shown increased prevalence in the Caribbean since October 2013. There have been several outbreaks throughout Asian and African countries over the past few decades with global travel and tourism having a major impact on the further spread of this disease. Improved policies and practices for preventative measures and epidemiological surveillance must be implemented to prevent the continued transmission of chikungunya.

Diabetic retinopathy and its risk factors at the university hospital in Jamaica

PURPOSE

To determine the frequency of diabetic retinopathy and its risk factors in diabetic patients attending the eye clinic at the University Hospital of the West Indies (UHWI).

MATERIALS AND METHODS

This was a prospective cohort study of diabetic outpatients attending the Eye Clinic at the UHWI. Data were collected on age, gender, type of diabetes mellitus (DM), type of diabetic retinopathy, other ocular diseases, visual acuity, blood glucose and blood pressure.

RESULTS

There were 104 patients (208 eyes) recruited for this study. There were 58.6% (61/104) females (mean age 53.6 ± 11.9 years) and 41.4% (43/104) males (mean age 61.7 ± 12.1 years). Type II DM was present in 68.3% (56% were females) of the patients and Type I DM was present in 31.7% (69.7% were females). Most patients (66%) were compliant with their diabetic medications. The mean blood glucose was 11.4 ± 5.3 mmol/L. Elevated blood pressure (<130/80) was present in 82.7% of patients. The mean visual acuity was 20/160 (logMAR 0.95 ± 1.1). The frequency of diabetic retinopathy was 78%; 29.5% had background retinopathy, and 50.5% of eyes had proliferative diabetic retinopathy (PDR) of which 34% had tractional retinal detachments. The odds ratio of developing PDR was 1.88 (95% confidence intervals (CI): 1.02-3.3) for Type I DM compared to 0.74 (95% CI: 0.55-0.99) for Type II DM. PDR was more prevalent in females (χ(2), P = 0.009) in both Type I and II DM.

CONCLUSIONS

Jamaica has a high frequency of PDR which is more common in Type I diabetics and females. This was associated with poor glucose and blood pressure control.

Sphenoidal sinus mucocele presenting with acute visual loss in a scuba diver

A 43-year-old male scuba diver presented with an acute history of painful unilateral visual loss after scuba diving. He had right-sided retrobulbar pain and headache. He was known to have sinusitis and had transient visual loss in two previous episodes after scuba diving. His visual acuity was hand motions and 20/20 in the right and left eye, respectively. There was no proptosis. He had a right relative afferent pupillary defect. Colour vision was normal in the left eye and absent in the right eye. Fundal examination revealed healthy discs and macula bilaterally. He was assessed as a right optic neuropathy, possibly secondary to compression. An MRI of the brain revealed a large sphenoidal mucocele extending into the right optic foramen. He was treated with oral steroids, antibiotics and nasal decongestants. He underwent endoscopic intranasal sphenoidectomy and marsupialisation with return of his visual acuity to 20/25 in that eye.

Orbital lymphangioma in a child: a diagnostic dilemma

We report a case of significant unilateral left proptosis after a fall in a 10-year old child. Magnetic resonance imaging showed an extraconal hyperintense orbital mass extending into the maxillary sinus which was opacified. After drainage the proptosis resolved. The cause of the acute proptosis was haemorrhage within an orbital lymphangioma.

Hospitalization trends in adult ocular trauma at the University Hospital of the West Indies

OBJECTIVE

To assess the epidemiology of ocular trauma in adult patients admitted to the University Hospital of the West Indies (UHWI), Jamaica, between January 2000 and December 2005.

METHODS

Retrospective review of all adult patients admitted with ocular trauma in the UHWI trauma database.

RESULTS

Three hundred and ninety-seven patients were admitted with ocular trauma during the study period; 35.8% of admissions with ocular trauma were < or = 16 years of age. There were 252 adults (> 17 years old), 21.4% (54/252) were females and 78.6% (198/252) were males. The ratio of males to females was 3.7:1. The median age of the females and males was 32 years (95% CI 27, 35.9) and 33 years (95% CI 30, 35.0), respectively. The hospitalization period ranged from 1-283 days, mean 8.8 days in the males; and ranged from 1-39 days, mean six days in the females. March had the highest mean admissions over the six years. Severe chemical burns were the cause of the longest admissions. The most commonplace of injury was the home (30.2%) followed by in the street (28.2%); only 2% were from recreation. The most common cause of ocular injury was motor vehicle accident in 18.6%. The second most common cause was from nail hammering (14.3%); of this, 97.2% were male. Females (14.8%) were more commonly admitted from chemical injuries than males (11.1%). Of the females, 50% were due to domestic dispute and 50% were accidental bleach spills.

CONCLUSION

The most common cause of ocular injury was motor vehicle accidents, nail hammering in males and chemical injuries in females. Epidemiological information is important in determining the burden of ocular disease on the population. It is essential in planning improvement in health services and patient education for prevention of serious eye injuries.

Paediatric ocular trauma admissions to the University Hospital of the West Indies 2000-2005

PURPOSE

To assess the epidemiology of paediatric ocular trauma presenting to the University Hospital of the West Indies (UHWI), Jamaica, between January 2000 and December 2005.

METHODS

Retrospective review of all paediatric patients (< or = 16 years old) admitted with ocular trauma in the UHWI trauma database.

RESULTS

Three hundred and ninety-seven patients were admitted with ocular trauma during the study period, 36.5% of admissions were < or = 16 years old. Males comprised 69.6% (101/145) of the paediatric admissions. The mean age was 8.3 years (95% CI 7.2, 9.4) and 8.7 years (95% CI 7.9, 9.4) for the females and males, respectively. The commonest place of injury was in the home: 47.5% and 50% in males and females, respectively Females were more likely to be involved in domestic disputes (4.8%). Stones (20.3%) were the most common causative agent of eye injury in children, only occurring in the 4-16-year old age group. The highest incidence for hospitalization of paediatric eye injury occurred in March and May, with the least admissions occurring in February. Contusions (48.3%) were the most common type of injury. Open globe injuries occurred in 35.9% of cases. Chemical burns were the least common type of injury. The admission period ranged from 1-58 days. The median hospitalization period was five days (95% CI 4.5, 6.0).

CONCLUSION

Paediatric ocular injury can be age specific. Contusion was the most common ocular injury and males were more likely to be hospitalized than females. Epidemiological information is important in determining the burden of ocular disease in the population. It is also essential in planning improvement in health services and patient education for prevention of serious eye injuries.

Glaucoma medication compliance issues in a Jamaican hospital eye clinic

OBJECTIVE

To investigate the level of compliance with glaucoma medications in a clinic setting and the factors associated with failed compliance.

METHOD

This was a prospective study done at the Glaucoma Clinic, University Hospital of the West Indies, between April and June 2005. Consecutive patients in the clinic were administered a questionnaire by the doctor Statistical analysis was done using cross-tabulations, Chi-square (Chi2) tests and odds ratio using SPSS version 11.0.

RESULTS

One hundred glaucoma patients were recruited: 63% were female; 57% of the total group was in the 61-80-year age group. Forty-seven per cent had been attending the glaucoma clinic for over 10 years. Eighty-five per cent knew their diagnosis, although only 22% understood their diagnosis. Patients who did not have a full understanding of glaucoma were more likely to be non-compliant (odds ratio 0.771 (95% CI 0.298, 1.995, p = 0.591)). Females were more likely to be compliant than males (odds ratio was 1.64 (95% CI 0.72, 3.75, p = 0.24)). Patients who were clinic attendees for less than five years duration were less compliant than those attending the glaucoma clinic for 6-10 years. The reasons for reduced compliance were financial in 44%, forgetfulness in 20% and eye-drops being unimportant in 12% of cases. The educational level of patients was not related to compliance.

CONCLUSION

The level of full compliance was 50% and partial compliance 43%. There was a 7% level of non-compliance. Higher levels of compliance were seen in females, patients who understood their diagnosis and those who had no co-morbid disease.

Anaesthesia for phacosemulsification surgery: is it as comfortable as we think?

We report an observational prospective study to determine which local anaesthetic technique gave the most comfort during phacoemulsification (cataract) surgery. 1835 patients were recruited. 61.8% were female. Peribulbar (18.2%), subtenons (28.6%), and topical (53.2%) anaesthesia was used. The pain score was assessed by the visual analogue pain scale (VAPS) which ranged from 0 (no pain) to 10 (worse possible pain). The lowest mean pain score occurred in the subtenons group, mean VAPS 0.2 (95% CI 0.1-0.3). The mean pain scores for topical and peribulbar anaesthesia were 0.6 (95% CI 0.5-0.7) and 0.59 (95% CI 0.41-0.76) respectively. Subtenons anaesthesia gave the most comfort during phacoemulsification. Patients experienced more discomfort with 2nd eye surgery. Older patients and males had a higher pain threshold in all three anaesthetic groups.

Ocular angiostrongyliasis--first case report from Jamaica

A 30-year-old female presented with a one-month history of blurred vision in her left eye. Examination revealed a live motile worm in the anterior chamber of the left eye. She also had retinal pigment epithelial disturbance with focal intraretinal haemorrhage. The 19.9 mm worm was surgically removed and identified as Angiostrongylus cantonesis. She was treated with oral mebendazole. Her vision improved from counting fingers in the left eye to 6/36. This is the first documented case of ocular angiostrongyliasis in Jamaica.

Aicardi syndrome associated with anterior cephalocele in a female infant

Aicardi syndrome is a triad of abnormalities that includes total or partial agenesis of the corpus callosum, chorioretinal lacunae, and infantile spasms. This syndrome was first described in 1965. A female infant with Aicardi syndrome associated with a nasoethmoidal cephalocele is described in this report. She presented with a history of unilateral nasal discharge since birth and seizures since age 1 week. She was microcephalic and there was visual impairment. A fleshy mass of the left nostril was noted. Ophthalmological evaluation revealed left exotropia, dysplastic optic discs and retina, 'morning glory' appearance of the left optic disc, and bilateral chorioretinal lacunae. Magnetic resonance imaging of the brain showed absence of the corpus callosum, dysmorphic changes of the lateral ventricles, a superiorly located third ventricle, heterotopic grey matter of the frontal lobes, a left nasoethmoidal cephalocele, and closed lip schizencephaly of the left frontal lobe. This female infant developed asymmetric infantile spasms at age 8 weeks. Surgical correction of the cephalocele was declined. She developed recurrent pneumonias secondary to aspiration of feeds and died at age 8 months during one of these events.

A provisional database for the silicon content of foods in the United Kingdom

Si may play an important role in bone formation and connective tissue metabolism. Although biological interest in this element has recently increased, limited literature exists on the Si content of foods. To further our knowledge and understanding of the relationship between dietary Si and human health, a reliable food composition database, relevant for the UK population, is required. A total of 207 foods and beverages, commonly consumed in the UK, were analysed for Si content. Composite samples were analysed using inductively coupled plasma–optical emission spectrometry following microwave-assisted digestion with nitric acid and H2O2. The highest concentrations of Si were found in cereals and cereal products, especially less refined cereals and oat-based products. Fruit and vegetables were highly variable sources of Si with substantial amounts present in Kenyan beans, French beans, runner beans, spinach, dried fruit, bananas and red lentils, but undetectable amounts in tomatoes, oranges and onions. Of the beverages, beer, a macerated whole-grain cereal product, contained the greatest level of Si, whilst drinking water was a variable source with some mineral waters relatively high in Si. The present study provides a provisional database for the Si content of UK foods, which will allow the estimation of dietary intakes of Si in the UK population and investigation into the role of dietary Si in human health.

Sustained visual recovery after treatment with intrathecal methotrexate in a case of optic neuropathy caused by chronic lymphocytic leukemia

A 68-year-old woman with chronic lymphocytic leukemia (CLL) had acute optic neuropathy associated with cerebrospinal fluid evidence of meningeal spread of CLL. There was no evidence of a hematologic relapse. After undergoing four weekly doses of intrathecal methotrexate, vision improved dramatically and spinal fluid became normal. Four years later, she has near normal vision in the affected eye and remains in hematologic remission. This is the first reported case of successful treatment of optic neuropathy in CLL with intrathecal methotrexate alone.

Macula off retinal detachments. How long can they wait before it is too late?

PURPOSE

To determine the association between the duration of macula off detachment and the visual outcome following corrective surgery.

METHODS

Retrospective review of the medical records of patients who underwent surgery for macula off detachment over a 5 year period (April 1994- March 1999).

RESULTS

There were 104 patients in the study. Patients with macula off detachments wait a mean of 2.6 weeks (+/-0.3 SE mean) before presentation and 1.8 weeks (+/-0.2 SE of mean) thereafter before surgery. The mean duration of detachment prior to surgical repair was 4.2 weeks (+/-0.3 SE mean). 78% of patients achieved a postoperative improvement in visual acuity. 36.5% achieved functional visual success of 6/12 at 3 months, which increased to 51% at final discharge. There was no significant difference in visual outcomes for patient undergoing internal vs external procedures (p=0.188). The preoperative visual acuity was the most significant predictor of post operative visual acuity (p<0.0005). Less than 40% of macula off detachments of > or =6 weeks duration will achieve a vision of 6/12 or better compared with 68.2% of patients with macula off detachments of < or =1 week.

CONCLUSIONS

The best mean postoperative vision (LogMAR 0.35) was seen in patients with detachment of <1 week duration. Patients <60 years are more likely to achieve visual improvement despite the duration of the detachment. Macula off detachments of >6 weeks duration have a significantly poor postoperative visual prognosis. Awareness of this visual prognosis can assist in planning the timing of surgery to ensure an acceptable result.

Ethnic differences in the demand incidence of retinal detachments in two districts in the West Midlands

AIM

To evaluate the epidemiological characteristics of rhegmatogenous retinal detachments (RRDs) in two defined populations in the West Midlands of England.

METHODS

A 5-year retrospective study of patients who underwent surgical repair of their RRD between April 1994 and March 1999. Statistical analysis was done by the Statistical Program for Social Sciences (SPSS) version 10.0.

RESULTS

The total demand incidence of RRD was 11.3 and 6.3 per 100,000 in Wolverhampton and Walsall, respectively. The Asian subgroup had a low demand incidence of 4.6 and 2.0 per 100,000 in each area, respectively. In Wolverhampton the highest age-specific demand incidence was in the 70 to 79-year age group at 29.1 per 100,000, whereas in Walsall it was 98.6 per 100,000 in the 85+ age group. Nontraumatic phakic detachments had the highest demand incidence of 9.7 per 100,000, whereas nontraumatic pseudophakic and aphakic R/D were much lower at 1.2 and 0.3 per 100,000, respectively. There was a 1 : 1.5 female-to-male ratio, with a mean age of 57.8 years (95% CI 54.7-61.0) in females and 55.5 years (95% CI 53.1-57.9) for males. A total of 41.6% (142) of patients presented initially to the Wolverhampton Eye Infirmary Accident and Emergency Department (A&E).

CONCLUSION

This is the first UK-based study. The demand incidence in Caucasians is similar to worldwide figures. Asians have a three times lower incidence of retinal detachments. The demand incidence increases with age. Females have a higher mean age than males. Males (89.5%) were more likely to suffer from traumatic detachments. Younger patients were more likely to present to the optometrist initially. Less than half of the patients will present initially to the eye A&E.