Pregnancy-associated retinal diseases and their management

The relation of somatotypes and stress response to central serous chorioretinopathy

PURPOSE

To investigate a possible relationship between central serous chorioretinopathy (CSC) and specific body types and compositions (somatotypes), and to examine the cortisol stress response among CSC patients of different somatotypes in comparison with healthy subjects.

METHODS

Prospective case-control study. A group of 28 patients with a previous or current diagnosis of CSC was compared with a group of 26 healthy subjects. Anthropometric measurements were used to estimate somatotype ratings in all subjects. Serum cortisol was measured at rest and following a stress-inducing computerized test in order to estimate response to stress in both groups. The main outcome measures included somatotype categorization and the change in serum cortisol following stress in both groups.

RESULTS

No significant difference in somatotype composition was found between the groups. There was no statistically significant difference between the groups in the elevation of cortisol following the stress-inducing test. The sample size was too small to exclude or find any significant difference between the different 13 subgroups of somatotype composition in the elevation of cortisol.

CONCLUSIONS

Our study did not show a typical somatotype related to CSC. While previous studies showed higher cortisol values in CSC patients, we did not see a higher elevation in blood cortisol following a stress response in this group in comparison with healthy subjects.

Clinical Features of Pregnancy-associated Retinal and Choroidal Diseases Causing Acute Visual Disturbance

PURPOSE

To report clinical features of patients with retinal and choroidal diseases presenting with acute visual disturbance during pregnancy.

METHODS

In this retrospective case series, patients who developed acute visual loss during pregnancy (including puerperium) and visited a tertiary hospital from July 2007 to June 2015, were recruited by searching electronic medical records. Patients were categorized according to the cause of visual loss. Clinical features and required diagnostic modalities were analyzed in the retinal and choroidal disease group.

RESULTS

Acute visual loss occurred in 147 patients; 49 (38.9%) were classified into the retinal and choroidal group. The diagnoses included central serous chorioretinopathy (22.4%), hypertensive retinopathy with or without pre-eclampsia (22.4%), retinal tear with or without retinal detachment (18.4%), diabetic retinopathy progression (10.2%), Vogt-Koyanagi-Harada disease (4.1%), retinal artery occlusion (4.1%), multiple evanescent white dot syndrome (4.1%), and others (14.3%). Visual symptoms first appeared at gestational age 25.9 ± 10.3 weeks. The initial best-corrected visual acuity (BCVA) was 0.27 ± 0.39 logarithm of the minimum angle of resolution (logMAR); the final BCVA after delivery improved to 0.13 ± 0.35 logMAR. Serious visual deterioration (BCVA worth than 20 / 200) developed in two patients. Differential diagnoses were established with characteristic fundus and spectral-domain optical coherence tomography findings in all cases.

CONCLUSIONS

In pregnant women with acute visual loss, retinal and choroidal diseases are common and could be vision threatening. Physicians should be aware of pregnancy-associated retinal and choroidal diseases and their clinical features. The differential diagnosis can be established with non-invasive techniques.

Gestational diabetes mellitus is a significant risk factor for long-term ophthalmic morbidity

PURPOSE

To investigate whether patients with a history of gestational diabetes mellitus (GDM) have an increased risk for long-term ophthalmic morbidity.

METHODS

Design a population-based study compared the incidence of long-term maternal ophthalmic morbidity in a cohort of women with and without a history of GDM. Setting Soroka University Medical Center.

PARTICIPANTS

All singleton pregnancies of women who delivered between 1988 and 2013. Main outcome measure(s) Diagnosis of ophthalmic morbidity. Analyses A Kaplan-Meier survival curve was used to estimate cumulative incidence of ophthalmic morbidity. Cox proportional hazards models were used to estimate the adjusted hazard ratios (HR) for ophthalmic morbidity.

RESULTS

During the study period, 104,751 deliveries met the inclusion criteria; 9.4% (n = 9888) of which occurred in patients with a diagnosis of GDM during at least one of their pregnancies. Patients with GDM had a significantly higher incidence of ophthalmic morbidity such as glaucoma, diabetic retinopathy, and retinal detachment compared with controls (0.1 vs. 0.02%, p < 0.001; 0.2 vs. 0.04%, p < 0.001; 0.2 vs. 0.1%, p < 0.001, respectively). Patients with concurrent GDM and preeclampsia had a significantly higher incidence of total ophthalmic complications compared to patients with GDM only (1 vs. 0.6%, respectively, p < 0.001). Using Kaplan-Meier survival curve, patients with a previous diagnosis of GDM had significantly higher cumulative incidence of ophthalmic morbidity (p < 0.001, log-rank test). In the Cox proportional hazards model, a history of GDM remained independently associated with ophthalmic morbidity (adjusted HR 2.0; 95% CI 1.5-2.8; p < 0.001).

CONCLUSIONS

GDM is an independent risk factor for long-term maternal ophthalmic morbidity.

A novel marker in acute central serous chorioretinopathy: thiol/disulfide homeostasis

PURPOSE

The aim of this study was to compare dynamic thiol/disulfide homeostatic status in acute central serous chorioretinopathy (CSCR) patients by using a novel and automated assay determining dynamic thiol/disulfide homeostasis.

METHODS

Fifty-one patients with acute CSCR (study group) and 65 healthy individuals (control group) were enrolled in this study. Diagnosis of acute CSCR was made clinically and using spectral-domain RTVue OCT (optical coherence tomography) (Optovue, Fremont, CA). Fluorescein angiography confirmed the diagnosis of acute CSCR in all subjects. Total thiol, native thiol, disulfide amount, and native thiol/disulfide ratio (TDR) were calculated in the blood samples.

RESULTS

Mean total thiol, native thiol, and native TDR values were lower in patients with acute CSCR (364.2 ± 14.1, 326.4 ± 13.2, 17.14 ± 1.9, respectively) than in healthy eyes (441.2 ± 16.3, 398.5 ± 16.4, 22.70 ± 2.15, respectively; mean total thiol, p = 0.017; native thiol, p = 0.011; native TDR, p = 0.031).

CONCLUSIONS

Total thiol, native thiol, and native TDR were significantly lower statistically in patients with acute CSCR when compared with healthy controls.

Idiopathic choroidal neovascularisation in pregnancy: treatment options and a successful outcome

Choroidal neovascularisation (CNV) is a major cause of visual loss and treatment options aim to halt progression and stabilise vision. We describe a 29-year-old woman who presented with blurred vision and distortion in her left eye while 26 weeks pregnant. She was diagnosed with idiopathic CNV and multiple treatment options were discussed. The patient did not want to undertake any risks from having an anti vascular endothelial growth factor agent during pregnancy. Therefore on discussion with the obstetric team, she elected to have early delivery at 32 weeks followed by a course of intravitreal bevacizumab. Subsequently there was resolution of symptoms and intraretinal and subretinal fluid. CNV is uncommonly seen in pregnancy and there remains no consensus on treatment. We describe the third reported case of idiopathic CNV in pregnancy. Careful patient counselling and close liaison between the ophthalmology and obstetric teams are necessary in this condition to obtain a safe outcome while maximising vision.

Role of agonistic autoantibodies against type-1 angiotensin II receptor in the pathogenesis of retinopathy in preeclampsia

To investigate the mechanism underlying AT1-AA-induced retinopathy in severe preeclampsia by measuring the positive rate and titer of AT1-AA in plasma from women with severe preeclampsia and normal pregnant women to see whether AT1-AA titer was correlated with the grade of retinopathy. A preeclampsia rat model was also established by intravenous injection of AT1-AA extracted from the plasma of patient suffering from severe preeclampsia. The results showed that the plasma titer and positive rate of AT1-AA were significantly higher in women with severe preeclampsia than normal pregnant women. The antibody titer in cases of severe preeclampsia was associated with the grade of retinopathy, and positively correlated with the level of TNF-α and VEGF. The animal experiment results showed that the modeled rats presented symptoms very similar to symptoms of human preeclampsia, including retinopathy. Ocular fundus examination showed retinal microvascular abnormalities, hemorrhaging and leakage in the severe preeclampsia. Morphological changes included edema, thickening of the INL and ONL, and pigment atrophy. TNF-α and VEGF levels were increased in the vitreous humor and retina of the model rats. Our studies results suggest that abnormal expression of AT1-AA could induce damage to retinal capillary endothelial cells and increase vascular permeability, resulting in retinopathy.

Central serous chorioretinopathy: what we have learnt so far

Central serous chorioretinopathy (CSCR) is a common retinal cause of visual loss. The mainstays of management are observation, photodynamic therapy (PDT) and laser procedures. Over the past decade, there has been rapid development in the existing and novel imaging techniques, functional testing and management of CSCR. However, there is no convincing treatment designed for CSCR yet. In recent years, the advances in PDT, with various adjustments in fluence and verteporfin dosage, and the comparisons between different types of PDT for acute and chronic CSCR in recent studies have provided greater insights into the role of PDT in treating CSCR. Novel laser procedures, such as the diode micropulse laser, have shown comparable efficacy to conventional lasers without laser-induced damage. Antivascular endothelial growth factor, which was originally developed for treating cancers, has emerged to be a potentially effective treatment for CSCR. The potential role of mineralocorticoid receptor antagonists in treating CSCR has provided greater understanding of the pathogenesis. Based on the relevant studies, mainly from the past decade, we discuss updates to the management of CSCR according to the risk factor modifications, pharmacological interventions, PDT and laser procedures and concluded that PDT is the current best option for CSCR.

SPONTANEOUS REGRESSION OF SEROUS RETINAL DETACHMENT ASSOCIATED WITH CIRCUMSCRIBED CHOROIDAL HEMANGIOMA AFTER CHILDBIRTH

PURPOSE

To report a case of circumscribed choroidal hemangioma complicated by retinal detachment and regressed spontaneously after childbirth.

METHODS

Clinical examination, fundus photography, spectral domain optical coherence tomography with enhanced depth imaging, fundus autofluorescence, fluorescein angiography, indocyanine green angiography, and microperimetry.

RESULTS

A 41-year-old woman was referred with a 2-week history of decreased vision and scotoma in the left eye. She was in her sixth month of pregnancy. Fundus examination revealed a circumscribed choroidal hemangioma appearing as a solitary orange-red mass in the upper peripapillary area and neurosensory retinal detachment of the macula. After the birth, spontaneous regression of the retinal detachment was observed.

CONCLUSION

Pregnancy may cause exacerbation of choroidal hemangioma, and regression of the exudation may occur spontaneously after delivery. Treatment is not indicated when symptoms or signs of exudation disappear.

Central serous chorioretinopathy and systemic corticosteroids in rheumatic diseases: report of three cases

Background

Central serous chorioretinopathy is a disorder often related to systemic corticosteroids, drugs commonly used in rheumatologists’ clinical practice. Central serous chorioretinopathy prognosis is generally good but in some cases, it may lead to substantial loss of vision resulting in an important functional limitation for patients.

It is very important to distinguish this pathology from other diseases involving retinal detachment. When central serous chorioretinopathy and uveitis coexist, it is mandatory to distinguish serous retinal detachment from a uveitis worsening, as the respective treatments can be radically different.

Case presentation

We describe three cases of central serous chorioretinopathy in patients taking systemic corticosteroids due to rheumatological diseases (ankylosing spondylitis, systemic lupus erythematosus and Behçet’s disease). They were diagnosed and managed at our Multidisciplinary (Rheumatology-Ophthalmology) Uveitis Clinic. All three cases improved after corticosteroids dose tapering.

Conclusion

Central serous chorioretinopathy must be kept in mind by rheumatologists as it is related to systemic corticosteroids.

Optical Coherence Tomography Angiography in Central Serous Chorioretinopathy

Purpose. To analyze optical coherence tomography angiography (OCTA) findings in eyes with central serous chorioretinopathy (CSC) and to compare them with those obtained with multimodal imaging. Methods. A series of consecutive patients diagnosed with CSC, underwent OCTA and multimodal imaging, including spectral domain OCT, fluorescein, and indocyanine green angiography. OCTA images were performed at three main depth intervals: automatically segmented outer retina, manually adjusted outer retina, and automatically segmented choriocapillaris. Results. Thirty-three eyes of 32 consecutive patients were analyzed. OCTA showed 3 main anomalies at the choriocapillaris: the presence of dark areas (19/33 eyes) which were frequently associated with serous retinal detachment, presence of dark spots (7/33 eyes) which were frequently associated with retinal pigment epithelium detachment, and presence of abnormal vessels (12/33 eyes) which were frequently, but not systematically, associated with choroidal neovascularization, as confirmed by multimodal imaging. Conclusions. OCTA revealed dark areas and dark spots, which were commonly observed. An abnormal choroidal pattern was also observed in one-third of cases, even when multimodal imaging did not evidence any choroidal neovascularization. Abnormal choroidal vessels should be interpreted with caution, and we could assume that this pathological choroidal vascular pattern observed in many CSC cases could be distinct from CNV.

Evaluation of Choroidal Thickness and Volume during the Third Trimester of Pregnancy using Enhanced Depth Imaging Optical Coherence Tomography: A Pilot Study

BACKGROUND

During pregnancy the maternal choroid is exposed to the multiple haemodynamic and hormonal alterations inherent to this physiological condition. These changes may influence choroidal anatomy. In this study a quantitative assessment of overall choroidal structure is performed, by constructing a 3-dimensional topographic map of this vascular bed.

PURPOSE

To compare the thickness and volume of the maternal choroidal in the third trimester of pregnancy with that of an age-matched control group of women.

MATERIALS AND METHODS

Twenty-four eyes of 12 pregnant women in the last trimester and 12 age-matched healthy controls (24 eyes) were included. Optical coherence tomography in enhanced depth imaging mode was used to construct maps of the choroid of the macular area. Choroidal thickness and volume were automatically calculated for the 9 subfields defined by the Early Treatment Diabetic Retinopathy Study (ETDRS). A comparative analysis between the two groups was performed using the two-way ANOVA test.

RESULTS

The average thickness of the choroid for the entire ETDRS area of the pregnant group was 295.15 ±42.40μm and 271.56 ±37.65μm in the control group (p=0.051). The average choroidal volume was 8.05 ±1.12mm(3) and 7.46 ±1.03mm(3), respectively (p=0.067). Although the choroid of the pregnant group had larger thickness and volume in all subfields compared to the control group, this difference was statistically significant only in three regions - the central subfield, minimum foveal thickness and inferior inner macula (p<0.05).

CONCLUSION

Our study suggests that in the third trimester of pregnancy the choroid may be subjected to physiological changes in structure. Whether these changes are a result of hormonal and/or haemodynamic adaptations of pregnancy remains to be studied.

Assessment of Macular Peripapillary Nerve Fiber Layer and Choroidal Thickness Changes in Pregnant Women with Gestational Diabetes Mellitus, Healthy Pregnant Women, and Healthy Non-Pregnant Women

Background

Gestational diabetes mellitus (GDM) is a risk factor for the development of type II diabetes and it causes maternal and child morbidity. Screening for diabetic retinopathy (DR) is important because patients who develop DR have no symptoms until macular edema and/or proliferative diabetic retinopathy (PDR) are already present. The aim of this study was to determine the early retinal findings of GDM.

Material/Methods

This study was conducted in a tertiary research center. We conducted a prospective cross-sectional study with 3 groups: Group 1 consisted of 36 pregnant women with GDM, Group 2 consisted of 24 healthy pregnant women, and Group 3 consisted of 38 healthy non-pregnant women of reproductive age. Spectralis optical coherence tomography (OCT) was used for the assessment. Macular, choroid, and retinal nerve fiber layer (RNFL) thicknesses were evaluated in patients with GDM and comparisons were made among pregnant women with GDM, healthy pregnant women, and healthy non-pregnant women for these parameters.

Results

The nasal part of the RNFL was significantly thinner in the GDM group than in the healthy pregnant group. None of the patients had retinopathy or macular edema at the time of examination.

Conclusions

Decreased nasal part of RNFL thickness may be the first retinal change in patients with GDM. Our study suggests that OCT should be performed for the patients with GDM for detection of early retinal changes associated with GDM.

Retinal vein occlusion and pregnancy, pre-eclampsia, and eclampsia: the results from a nationwide, population-based study using the national claim database

Objective

To investigate the incidence of retinal vein occlusion (RVO) in pregnant women and in the subpopulation of pregnant women with pre-eclampsia/eclampsia compared to that in the age-matched general female population to determine if there is increased risk of RVO in pregnancy.

Design

Nationwide population-based retrospective study using data entered into the Korean national health claims database from 2007 to 2011.

Setting and Participants

Of the incident RVO cases in the database, RVO cases that occurred during the pregnancy-associated period, which spanned a 52-week period from 40-weeks-before to 12-weeks-after childbirth, were identified. Of these cases, the presence of pre-eclampsia/eclampsia was determined.

Main Outcome and Measure

The standardized incidence ratios (SIRs) of RVO in the general pregnant population and in the pregnant population with pre-eclampsia/eclampsia were determined with respect to the age-matched general female population.

Results

Pregnancy-related RVO was identified in 33 cases from the 1.8 million women who experience childbirth during the study period, while the expected number of cases calculated by the direct standardization to the age-matched general population was 113. Of the 33 patients, 12 patients (36.4%) had pre-eclampsia or eclampsia. The SIR for the general pregnant population in reference to the age-matched general female population was 0.29 (95% CI, 0.20–0.41). In contrast, the SIR for the pregnant population with pre-eclampsia/eclampsia in reference to the age-matched general female population and the age-matched general pregnant population was 67.50 (95% CI, 34.88–117.92) and 246.50 (95% CI, 127.37–430.59), respectively.

Conclusions and Relevance

The results suggest that pre-eclampsia/eclampsia is a risk factor for RVO, while pregnancy itself may not be a risk factor for RVO.

Changes in choroidal thickness during pregnancy detected by enhanced depth imaging optical coherence tomography

AIM

To compare the choroidal thickness measurements of healthy pregnant women obtained in the first trimester with measurements obtained in the third trimester using enhanced depth imaging optical coherence tomography (OCT).

METHODS

54 eyes of 27 healthy pregnant women and 50 eyes of 25 age matched healthy women were enrolled in this observational, cross-sectional study. The pregnant women underwent two OCT scans, one in the first trimester at gestational weeks 6-8, and the other during the third trimester at gestational weeks 32-37; the control group had OCT scanning during the follicular phase of the menstrual cycle, using the enhanced depth imaging mode. Choroidal thicknesses were measured at the fovea, at three locations nasal, and at three locations temporal to the fovea at 500 μm intervals.

RESULTS

The choroidal thickness measurements obtained in the third trimester were significantly decreased in all measured points in both eyes compared to the measurements obtained in the first trimester (p<0.05). At the fovea, the mean (±SD) choroidal thickness measured in the first trimester was 349.22±82.11 μm in the right eyes and 341.30±85.22 μm in the left eyes, which decreased to 333.56±76.61 μm in the right eyes (p=0.014) and 326.93±75.84 μm in the left eyes (p=0.024) in the third trimester. Although not statistically significant, choroidal thicknesses of the control group were less than the choroidal thicknesses of the pregnant women (p>0.05).

CONCLUSIONS

Choroidal thickness was found to be significantly decreased in healthy pregnant women during the third trimester compared to the first trimester. This finding can provide valuable information when interpreting pregnancy related ocular disorders.

Male-female differences in diabetic retinopathy?

The purpose of this paper is to review male-female differences in the incidence and prevalence of diabetes and diabetic retinopathy. These differences will be established primarily through results from our present research and a review of related literature. Previously, we have demonstrated that neuroretinal dysfunction can be used to predict the location of future retinopathy up to three years before it is manifest. Our current research suggests that, for type 2 diabetes, the normal differences in neuroretinal function between nondiabetic males and females under 50 years of age are altered in patients with type 2 diabetes. Furthermore, local neuroretinal function in type 2 diabetes is more abnormal in adult males compared with adult females. The literature also suggests that there are male-female differences in the occurrence of diabetes. In adolescence, the incidence of type 1 diabetes is greater in males, whereas in type 2 diabetes, the incidence is greater in females. This excess of females in type 2 diabetes shifts to a more equal incidence between the two sexes in adults. In addition, advanced retinopathy in type 1 diabetes appears to be more common in males, and the presence and severity of diabetic retinopathy at the time of diagnosis in type 2 diabetes appears to be more associated with male sex. Although the reasons for male-female differences identified in this review are unknown, sex appears to be a significant factor in certain aspects of diabetes incidence and diabetic retinopathy.

Ocular changes during pregnancy

BACKGROUND

Most ocular changes in pregnancy are harmless. For example, 14% of pregnant women need a new eyeglass prescription. Some changes, however, are serious, such as retinal effects of hypertension, which can be a sign of pre-eclampsia. Ocular changes may give rise to uncertainty about the administration of ophthalmological drugs or the optimal method of childbirth.

METHOD

This review is based on pertinent literature retrieved by a selective search in Medline and on guidelines from Germany and abroad. Recommendations about drugs were taken from the Embryotox and Reprotox databases, the German Red List, and the United States Food and Drug Administration (FDA).

RESULTS

40% to 100% of pregnant women with high blood pressure have retinal changes whose severity is correlated with the severity of pre-eclampsia or eclampsia. Diabetic women should undergo ocular examination before and during pregnancy. Pre-existing retinal changes worsen during pregnancy in 55% of cases. Most ocular diseases can be treated with the usual drugs in pregnant women and nursing mothers, although the evidence for drug safety is derived from case series and the treatment is usually provided off label. Ocular conditions that are present before pregnancy are irrelevant to the choice of a method of childbirth.

CONCLUSION

Pregnant women and nursing mothers can undergo most types of ophthalmological examination and treatment. Recommendations about drug treatment should be checked against current information that can be found on the embryotox.de and reprotox.de websites.

Gender differences in ocular blood flow

Gender medicine has been a major focus of research in recent years. The present review focuses on gender differences in the epidemiology of the most frequent ocular diseases that have been found to be associated with impaired ocular blood flow, such as age-related macular degeneration, glaucoma and diabetic retinopathy. Data have accumulated indicating that hormones have an important role in these diseases, since there are major differences in the prevalence and incidence between men and pre- and post-menopausal women. Whether this is related to vascular factors is, however, not entirely clear. Interestingly, the current knowledge about differences in ocular vascular parameters between men and women is sparse. Although little data is available, estrogen, progesterone and testosterone are most likely important regulators of blood flow in the retina and choroid, because they are key regulators of vascular tone in other organs. Estrogen seems to play a protective role since it decreases vascular resistance in large ocular vessels. Some studies indicate that hormone therapy is beneficial for ocular vascular disease in post-menopausal women. This evidence is, however, not sufficient to give any recommendation. Generally, remarkably few data are available on the role of sex hormones on ocular blood flow regulation, a topic that requires more attention in the future.

Intravitreal bevacizumab injection in unrecognised early pregnancy

PURPOSE

The use of intravitreal vascular endothelial growth factor (VEGF) inhibitor medications has widened considerably to include indications affecting females of reproductive age.

PATIENTS AND METHODS

We present our experiences following intravitreal injection of bevacizumab during the first trimester of unrecognised pregnancies in four women.

RESULTS

All our patients were inadvertently exposed to bevacizumab within the first trimester when placental growth and fetal organogenesis take place. There were three cases of pregnancy without complication and one case of complicated pregnancy in which there was a significant past obstetric history.

CONCLUSION

This case series provides further insights into intravitreal injection of bevacizumab in early pregnancy. There is insufficient information to suggest that such use is safe, nor is there definitive evidence to suggest that it causes harm. We advise that ophthalmologists discuss pregnancy with women of childbearing age undergoing intraocular anti-VEGF injections. Should a woman become pregnant, counselling is needed to explain the potential risks and benefits, and the limited available data relating to the use of these agents in early pregnancy.

Nationwide incidence of clinically diagnosed retinal vein occlusion in Korea, 2008 through 2011: preponderance of women and the impact of aging

OBJECTIVE

This study aimed at defining the incidence and demographics of clinically diagnosed retinal vein occlusion (RVO) in Korea.

DESIGN

Nationwide population-based retrospective study using data entered into the Korean national health claims database from 2007 through 2011.

PARTICIPANTS

Data of the entire population of Korea (n = 47,990,761, based on the 2010 census) were analyzed.

METHODS

The Korean national health claims database was analyzed to identify patients with RVO. Incident cases included individuals with no RVO claims in 2007, but with RVO claims in the years 2008 through 2011. The incidence rate of RVO was estimated for the entire Korean population.

MAIN OUTCOME MEASURES

The person-time incidence rates of clinically diagnosed RVO in Korea, including the age- and gender-specific incidence rates, were estimated.

RESULTS

A total of 92 730 RVO cases (56.4% in women) were identified. The incidence rate of clinically diagnosed RVO during the study period was 48.31 per 100,000 person-years (95% confidence interval [CI], 48.00-48.62). The incidence rate among men and women was 42.40 (95% CI, 41.99-42.81) and 54.14 (95% CI, 53.67-54.60) per 100,000 person-years, respectively (P < 0.001). The highest incidence of 214.92 per 100,000 person-years (95% CI, 211.29-218.56) was observed in the age group of 70 to 74 years (186.62 [95% CI, 181.46-191.78] and 236.25 [95% CI, 231.21-241.29] per 100,000 person-years for men and women aged 70 to 74 years, respectively). The incidence rate of RVO increased as the age of the population increased-more than doubling approximately every 10 years from the second to the seventh decade of life. Retinal vein occlusion occurred more often in men 30 to 54 years of age and in men older than 85 years, but was more common in women 55 to 84 years of age.

CONCLUSIONS

This study reports the population-based RVO incidence in Korea. The RVO incidence increased exponentially as the age of the population increased, and the RVO incidence in women was 1.28 times higher than that in men.

Evaluation of the macula, retinal nerve fiber layer and choroid in preeclampsia, healthy pregnant and healthy non-pregnant women using spectral-domain optical coherence tomography

OBJECTIVE

To evaluate the macular, retinal nerve fiber layer (RNFL) and choroidal thickness alterations by using spectral-domain optical coherence tomography (SD-OCT) in preeclampsia and compare with healthy pregnant and healthy non-pregnant controls.

METHOD

The study population included healthy pregnant control group (n: 25), healthy non-pregnant control group (n: 26) and study group with preeclampsia (n: 27). Retinal thickness parameters were measured by SD-OCT.

RESULTS

There was a statistically significant difference among all of the groups for choroidal thickness (p < 0.001). Choroidal thickness in preeclamptic women was significantly thinner than healthy pregnant women. The most thick choroid layer was detected in healthy pregnant group, and also the most thin choroidal thickness was detected in healthy non-pregnant group (p < 0.001). Macular central subfield and foveal center thickness were significantly thinner in preeclamptic study and healthy pregnant groups than healthy non-pregnant group (p < 0.001). However, there was no statistically significant difference between preeclamptic study group and healthy pregnant group for both macular central subfield and foveal center thickness. Average of RNFL thickness was significantly thicker in healthy pregnant group than healthy non-pregnant group (p = 0.004).

CONCLUSIONS

This study revealed that choroidal thickness measured using SD-OCT increased in women with preeclampsia and healthy pregnant women but the increase in choroidal thickness in preeclampsia was lower than the healthy pregnant controls. This lower rise in choroidal thickness can be generally attributed to the markedly increased systemic vascular vasospasm secondary to preeclampsia.

Risk Factors and Treatment Strategies in Patients With Retinal Vascular Occlusions

Retinal vein occlusion (RVO) and retinal artery occlusion (RAO) cause significant visual impairment. The role of thrombophilia and cardiovascular testing is uncertain, and optimal treatment strategies have not been determined. We reviewed medical records of 39 patients with RVO and RAO (23 women and 16 men). Thrombophilia and cardiovascular evaluations were performed and outcomes were reviewed. In all, 24 (61.5%) patients had at least 1 thrombophilia. Elevated factor VIII levels were found in RVO (n = 5) but not in RAO. There are no other significant differences in thrombophilias in RVO compared to those in RAO. Most patients had hypertension(41.2% RAO and 55% RVO) and hyperlipidemia (35.5% RAO and 81.8% RVO). In all, 4 women were using oral contraceptives, 2 were pregnant or postpartum. Follow-up data was available for 28 patients (13 RAO, 15 RVO). Nineteen were treated with aspirin, four with warfarin, and one with low molecular weight heparin. Eight patients reported improvement in vision at time of follow-up (5 RAO, 3 RVO). Multiple risk factors are associated with RVO and RAO, and a complete assessment should include thrombophilia and cardiovascular studies.

[Hypertensive changes of the fundus]

Systemic hypertension affects approximately 25 % of the population worldwide and is the most important preventable risk factor for cardiovascular diseases. Hypertension-related fundus abnormalities can be classified into hypertensive retinopathy, choroidopathy, and optic neuropathy. Hypertensive retinopathy causes vascular constriction of retinal arterioles and typical fundus findings, such as blot hemorrhages, hard exudates and cotton wool spots resulting from ischemia within the nerve fiber layer. The use of a detailed grading system based on the severity of vascular constriction is not practicable as arteriosclerotic changes are common among elderly people. Therefore, early stages with pure vascular pathology should be differentiated from severe forms of hypertensive retinopathy with parenchymal changes of the fundus. Screening the retina for hypertensive changes is essential in cases of severe systemic hypertension, acute visual impairment, diabetes mellitus and pregnancy.